diff --git a/packages/bbui/src/Layout/Layout.svelte b/packages/bbui/src/Layout/Layout.svelte
index 86fd844ca..af6067558 100644
--- a/packages/bbui/src/Layout/Layout.svelte
+++ b/packages/bbui/src/Layout/Layout.svelte
@@ -48,6 +48,9 @@
     padding-top: var(--spacing-l);
     padding-bottom: var(--spacing-l);
   }
+  .gap-XXS {
+    grid-gap: var(--spacing-xs);
+  }
   .gap-XS {
     grid-gap: var(--spacing-s);
   }
diff --git a/packages/builder/src/components/design/PropertiesPanel/ComponentSettingsSection.svelte b/packages/builder/src/components/design/PropertiesPanel/ComponentSettingsSection.svelte
index 972a2bb7f..35a4a9db1 100644
--- a/packages/builder/src/components/design/PropertiesPanel/ComponentSettingsSection.svelte
+++ b/packages/builder/src/components/design/PropertiesPanel/ComponentSettingsSection.svelte
@@ -67,6 +67,7 @@
             placeholder: setting.placeholder,
           }}
           {bindings}
+          {componentDefinition}
         />
       {/if}
     {/each}
diff --git a/packages/builder/src/components/design/PropertiesPanel/PropertyControls/AttachmentFieldSelect.svelte b/packages/builder/src/components/design/PropertiesPanel/PropertyControls/AttachmentFieldSelect.svelte
deleted file mode 100644
index 44557157b..000000000
--- a/packages/builder/src/components/design/PropertiesPanel/PropertyControls/AttachmentFieldSelect.svelte
+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-  import FormFieldSelect from "./FormFieldSelect.svelte"
-</script>
-
-<FormFieldSelect {...$$props} on:change type="attachment" />
diff --git a/packages/builder/src/components/design/PropertiesPanel/PropertyControls/BooleanFieldSelect.svelte b/packages/builder/src/components/design/PropertiesPanel/PropertyControls/BooleanFieldSelect.svelte
deleted file mode 100644
index 131a375b2..000000000
--- a/packages/builder/src/components/design/PropertiesPanel/PropertyControls/BooleanFieldSelect.svelte
+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-  import FormFieldSelect from "./FormFieldSelect.svelte"
-</script>
-
-<FormFieldSelect {...$$props} on:change type="boolean" />
diff --git a/packages/builder/src/components/design/PropertiesPanel/PropertyControls/DateTimeFieldSelect.svelte b/packages/builder/src/components/design/PropertiesPanel/PropertyControls/DateTimeFieldSelect.svelte
deleted file mode 100644
index c3b9b052c..000000000
--- a/packages/builder/src/components/design/PropertiesPanel/PropertyControls/DateTimeFieldSelect.svelte
+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-  import FormFieldSelect from "./FormFieldSelect.svelte"
-</script>
-
-<FormFieldSelect {...$$props} on:change type="datetime" />
diff --git a/packages/builder/src/components/design/PropertiesPanel/PropertyControls/FormFieldSelect.svelte b/packages/builder/src/components/design/PropertiesPanel/PropertyControls/FormFieldSelect.svelte
index 092656164..f8e4b18fe 100644
--- a/packages/builder/src/components/design/PropertiesPanel/PropertyControls/FormFieldSelect.svelte
+++ b/packages/builder/src/components/design/PropertiesPanel/PropertyControls/FormFieldSelect.svelte
@@ -23,6 +23,7 @@
   const getOptions = (schema, fieldType) => {
     let entries = Object.entries(schema ?? {})
     if (fieldType) {
+      fieldType = fieldType.split("/")[1]
       entries = entries.filter(entry => entry[1].type === fieldType)
     }
     return entries.map(entry => entry[0])
diff --git a/packages/builder/src/components/design/PropertiesPanel/PropertyControls/LongFormFieldSelect.svelte b/packages/builder/src/components/design/PropertiesPanel/PropertyControls/LongFormFieldSelect.svelte
deleted file mode 100644
index 65dd54d53..000000000
--- a/packages/builder/src/components/design/PropertiesPanel/PropertyControls/LongFormFieldSelect.svelte
+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-  import FormFieldSelect from "./FormFieldSelect.svelte"
-</script>
-
-<FormFieldSelect {...$$props} on:change type="longform" />
diff --git a/packages/builder/src/components/design/PropertiesPanel/PropertyControls/NumberFieldSelect.svelte b/packages/builder/src/components/design/PropertiesPanel/PropertyControls/NumberFieldSelect.svelte
deleted file mode 100644
index 2006aca0b..000000000
--- a/packages/builder/src/components/design/PropertiesPanel/PropertyControls/NumberFieldSelect.svelte
+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-  import FormFieldSelect from "./FormFieldSelect.svelte"
-</script>
-
-<FormFieldSelect {...$$props} on:change type="number" />
diff --git a/packages/builder/src/components/design/PropertiesPanel/PropertyControls/OptionsFieldSelect.svelte b/packages/builder/src/components/design/PropertiesPanel/PropertyControls/OptionsFieldSelect.svelte
deleted file mode 100644
index a01b83779..000000000
--- a/packages/builder/src/components/design/PropertiesPanel/PropertyControls/OptionsFieldSelect.svelte
+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-  import FormFieldSelect from "./FormFieldSelect.svelte"
-</script>
-
-<FormFieldSelect {...$$props} on:change type="options" />
diff --git a/packages/builder/src/components/design/PropertiesPanel/PropertyControls/RelationshipFieldSelect.svelte b/packages/builder/src/components/design/PropertiesPanel/PropertyControls/RelationshipFieldSelect.svelte
deleted file mode 100644
index 5cdb25a11..000000000
--- a/packages/builder/src/components/design/PropertiesPanel/PropertyControls/RelationshipFieldSelect.svelte
+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-  import FormFieldSelect from "./FormFieldSelect.svelte"
-</script>
-
-<FormFieldSelect {...$$props} on:change type="link" />
diff --git a/packages/builder/src/components/design/PropertiesPanel/PropertyControls/StringFieldSelect.svelte b/packages/builder/src/components/design/PropertiesPanel/PropertyControls/StringFieldSelect.svelte
deleted file mode 100644
index 62765676e..000000000
--- a/packages/builder/src/components/design/PropertiesPanel/PropertyControls/StringFieldSelect.svelte
+++ /dev/null
@@ -1,5 +0,0 @@
-<script>
-  import FormFieldSelect from "./FormFieldSelect.svelte"
-</script>
-
-<FormFieldSelect {...$$props} on:change type="string" />
diff --git a/packages/builder/src/components/design/PropertiesPanel/PropertyControls/ValidationEditor/ValidationDrawer.svelte b/packages/builder/src/components/design/PropertiesPanel/PropertyControls/ValidationEditor/ValidationDrawer.svelte
new file mode 100644
index 000000000..b4da2e8e6
--- /dev/null
+++ b/packages/builder/src/components/design/PropertiesPanel/PropertyControls/ValidationEditor/ValidationDrawer.svelte
@@ -0,0 +1,363 @@
+<script>
+  import {
+    Button,
+    Icon,
+    DrawerContent,
+    Layout,
+    Select,
+    Heading,
+    Body,
+    Input,
+    DatePicker,
+  } from "@budibase/bbui"
+  import { currentAsset, selectedComponent } from "builderStore"
+  import { findClosestMatchingComponent } from "builderStore/storeUtils"
+  import { getSchemaForDatasource } from "builderStore/dataBinding"
+  import DrawerBindableInput from "components/common/bindings/DrawerBindableInput.svelte"
+  import { generate } from "shortid"
+
+  export let rules = []
+  export let bindings = []
+  export let type
+
+  const Constraints = {
+    Required: {
+      label: "Required",
+      value: "required",
+    },
+    MinLength: {
+      label: "Min length",
+      value: "minLength",
+    },
+    MaxLength: {
+      label: "Max length",
+      value: "maxLength",
+    },
+    MaxValue: {
+      label: "Max value",
+      value: "maxValue",
+    },
+    MinValue: {
+      label: "Min value",
+      value: "minValue",
+    },
+    Equal: {
+      label: "Must equal",
+      value: "equal",
+    },
+    NotEqual: {
+      label: "Must not equal",
+      value: "notEqual",
+    },
+    Regex: {
+      label: "Must match regex",
+      value: "regex",
+    },
+    NotRegex: {
+      label: "Must not match regex",
+      value: "notRegex",
+    },
+    Contains: {
+      label: "Must contain row ID",
+      value: "contains",
+    },
+    NotContains: {
+      label: "Must not contain row ID",
+      value: "notContains",
+    },
+  }
+  const ConstraintMap = {
+    ["string"]: [
+      Constraints.Required,
+      Constraints.MaxLength,
+      Constraints.Equal,
+      Constraints.NotEqual,
+      Constraints.Regex,
+      Constraints.NotRegex,
+    ],
+    ["number"]: [
+      Constraints.Required,
+      Constraints.MaxValue,
+      Constraints.MinValue,
+      Constraints.Equal,
+      Constraints.NotEqual,
+    ],
+    ["boolean"]: [
+      Constraints.Required,
+      Constraints.Equal,
+      Constraints.NotEqual,
+    ],
+    ["datetime"]: [
+      Constraints.Required,
+      Constraints.MaxValue,
+      Constraints.MinValue,
+      Constraints.Equal,
+      Constraints.NotEqual,
+    ],
+    ["attachment"]: [Constraints.Required],
+    ["link"]: [
+      Constraints.Required,
+      Constraints.Contains,
+      Constraints.NotContains,
+      Constraints.MinLength,
+      Constraints.MaxLength,
+    ],
+  }
+
+  $: dataSourceSchema = getDataSourceSchema($currentAsset, $selectedComponent)
+  $: field = $selectedComponent?.field
+  $: schemaRules = parseRulesFromSchema(field, dataSourceSchema || {})
+  $: fieldType = type?.split("/")[1] || "string"
+  $: constraintOptions = getConstraintsForType(fieldType)
+
+  const getConstraintsForType = type => {
+    return ConstraintMap[type]
+  }
+
+  const getDataSourceSchema = (asset, component) => {
+    if (!asset || !component) {
+      return null
+    }
+    const formParent = findClosestMatchingComponent(
+      asset.props,
+      component._id,
+      component => component._component.endsWith("/form")
+    )
+    return getSchemaForDatasource(asset, formParent?.dataSource)
+  }
+
+  const parseRulesFromSchema = (field, dataSourceSchema) => {
+    if (!field || !dataSourceSchema) {
+      return []
+    }
+    const fieldSchema = dataSourceSchema.schema?.[field]
+    const constraints = fieldSchema?.constraints
+    if (!constraints) {
+      return []
+    }
+    let rules = []
+
+    // Required constraint
+    if (
+      field === dataSourceSchema?.table?.primaryDisplay ||
+      constraints.presence?.allowEmpty === false
+    ) {
+      rules.push({
+        constraint: "required",
+        error: "Required field",
+      })
+    }
+
+    // String length constraint
+    if (exists(constraints.length?.maximum)) {
+      const length = constraints.length.maximum
+      rules.push({
+        constraint: "maxLength",
+        value: length,
+        error: `Maximum ${length} characters`,
+      })
+    }
+
+    // Min / max number constraint
+    if (exists(constraints.numericality?.greaterThanOrEqualTo)) {
+      const min = constraints.numericality.greaterThanOrEqualTo
+      rules.push({
+        constraint: "minValue",
+        value: min,
+        error: `Minimum value is ${min}`,
+      })
+    }
+    if (exists(constraints.numericality?.lessThanOrEqualTo)) {
+      const max = constraints.numericality.lessThanOrEqualTo
+      rules.push({
+        constraint: "maxValue",
+        value: max,
+        error: `Maximum value is ${max}`,
+      })
+    }
+
+    return rules
+  }
+
+  const exists = value => {
+    return value != null && value !== ""
+  }
+
+  const addRule = () => {
+    rules = [
+      ...(rules || []),
+      {
+        valueType: "Binding",
+        type: fieldType,
+        id: generate(),
+      },
+    ]
+  }
+
+  const removeRule = id => {
+    rules = rules.filter(link => link.id !== id)
+  }
+
+  const duplicateRule = id => {
+    const existingRule = rules.find(rule => rule.id === id)
+    const newRule = { ...existingRule, id: generate() }
+    rules = [...rules, newRule]
+  }
+</script>
+
+<DrawerContent>
+  <div class="container">
+    <Layout noPadding gap="M">
+      <Layout noPadding gap={schemaRules?.length ? "S" : "XS"}>
+        <Heading size="XS">Schema validation rules</Heading>
+        {#if schemaRules?.length}
+          <div class="links">
+            {#each schemaRules as rule}
+              <div class="rule schema">
+                <Select
+                  placeholder="Constraint"
+                  value={rule.constraint}
+                  options={constraintOptions}
+                  disabled
+                />
+                <Select
+                  placeholder={null}
+                  value="Value"
+                  options={["Binding", "Value"]}
+                  disabled
+                />
+                <DrawerBindableInput
+                  placeholder="Constraint value"
+                  value={rule.value}
+                  {bindings}
+                  disabled
+                />
+                <DrawerBindableInput
+                  placeholder="Error message"
+                  value={rule.error}
+                  {bindings}
+                  disabled
+                />
+                <div />
+              </div>
+            {/each}
+          </div>
+        {:else}
+          <Body size="S">
+            There are no built-in validation rules from the schema.
+          </Body>
+        {/if}
+      </Layout>
+      <Layout noPadding gap="S">
+        <Heading size="XS">Custom validation rules</Heading>
+        {#if rules?.length}
+          <div class="links">
+            {#each rules as rule (rule.id)}
+              <div class="rule">
+                <Select
+                  bind:value={rule.constraint}
+                  options={constraintOptions}
+                  placeholder="Constraint"
+                />
+                <Select
+                  disabled={rule.constraint === "required"}
+                  placeholder={null}
+                  bind:value={rule.valueType}
+                  options={["Binding", "Value"]}
+                />
+
+                {#if rule.valueType === "Binding"}
+                  <!-- Bindings always get a bindable input -->
+                  <DrawerBindableInput
+                    placeholder="Constraint value"
+                    value={rule.value}
+                    {bindings}
+                    disabled={rule.constraint === "required"}
+                    on:change={e => (rule.value = e.detail)}
+                  />
+                {:else if ["maxLength", "minLength", "regex", "notRegex", "contains", "notContains"].includes(rule.constraint)}
+                  <!-- Certain constraints always need string values-->
+                  <Input
+                    bind:value={rule.value}
+                    placeholder="Constraint value"
+                  />
+                {:else}
+                  <!-- Otherwise we render a component based on the type -->
+                  {#if ["string", "number", "options", "longform"].includes(rule.type)}
+                    <Input
+                      disabled={rule.constraint === "required"}
+                      bind:value={rule.value}
+                      placeholder="Constraint value"
+                    />
+                  {:else if rule.type === "boolean"}
+                    <Select
+                      disabled={rule.constraint === "required"}
+                      options={[
+                        { label: "True", value: "true" },
+                        { label: "False", value: "false" },
+                      ]}
+                      bind:value={rule.value}
+                    />
+                  {:else if rule.type === "datetime"}
+                    <DatePicker
+                      enableTime={false}
+                      disabled={rule.constraint === "required"}
+                      bind:value={rule.value}
+                    />
+                  {:else}
+                    <DrawerBindableInput disabled />
+                  {/if}
+                {/if}
+                <DrawerBindableInput
+                  placeholder="Error message"
+                  value={rule.error}
+                  {bindings}
+                  on:change={e => (rule.error = e.detail)}
+                />
+                <Icon
+                  name="Duplicate"
+                  hoverable
+                  size="S"
+                  on:click={() => duplicateRule(rule.id)}
+                />
+                <Icon
+                  name="Close"
+                  hoverable
+                  size="S"
+                  on:click={() => removeRule(rule.id)}
+                />
+              </div>
+            {/each}
+          </div>
+        {/if}
+        <div class="button">
+          <Button secondary icon="Add" on:click={addRule}>Add Rule</Button>
+        </div>
+      </Layout>
+    </Layout>
+  </div>
+</DrawerContent>
+
+<style>
+  .container {
+    width: 100%;
+    max-width: 1000px;
+    margin: 0 auto;
+  }
+  .links {
+    display: flex;
+    flex-direction: column;
+    justify-content: flex-start;
+    align-items: stretch;
+    gap: var(--spacing-m);
+  }
+
+  .rule {
+    gap: var(--spacing-l);
+    display: grid;
+    align-items: center;
+    grid-template-columns: 190px 120px 1fr 1fr auto auto;
+    border-radius: var(--border-radius-s);
+    transition: background-color ease-in-out 130ms;
+  }
+</style>
diff --git a/packages/builder/src/components/design/PropertiesPanel/PropertyControls/ValidationEditor/ValidationEditor.svelte b/packages/builder/src/components/design/PropertiesPanel/PropertyControls/ValidationEditor/ValidationEditor.svelte
new file mode 100644
index 000000000..0b7fd12de
--- /dev/null
+++ b/packages/builder/src/components/design/PropertiesPanel/PropertyControls/ValidationEditor/ValidationEditor.svelte
@@ -0,0 +1,33 @@
+<script>
+  import { Button, ActionButton, Drawer } from "@budibase/bbui"
+  import { createEventDispatcher } from "svelte"
+  import ValidationDrawer from "./ValidationDrawer.svelte"
+
+  export let value = []
+  export let bindings = []
+  export let componentDefinition
+  export let type
+
+  let drawer
+
+  const dispatch = createEventDispatcher()
+  const save = () => {
+    dispatch("change", value)
+    drawer.hide()
+  }
+</script>
+
+<ActionButton on:click={drawer.show}>Configure Validation</ActionButton>
+<Drawer bind:this={drawer} title="Validation Rules">
+  <svelte:fragment slot="description">
+    Configure validation rules for this field.
+  </svelte:fragment>
+  <Button cta slot="buttons" on:click={save}>Save</Button>
+  <ValidationDrawer
+    slot="body"
+    bind:rules={value}
+    {type}
+    {bindings}
+    {componentDefinition}
+  />
+</Drawer>
diff --git a/packages/builder/src/components/design/PropertiesPanel/PropertyControls/componentSettings.js b/packages/builder/src/components/design/PropertiesPanel/PropertyControls/componentSettings.js
index 843597171..6cf2d7e05 100644
--- a/packages/builder/src/components/design/PropertiesPanel/PropertyControls/componentSettings.js
+++ b/packages/builder/src/components/design/PropertiesPanel/PropertyControls/componentSettings.js
@@ -12,14 +12,8 @@ import SectionSelect from "./SectionSelect.svelte"
 import NavigationEditor from "./NavigationEditor/NavigationEditor.svelte"
 import FilterEditor from "./FilterEditor/FilterEditor.svelte"
 import URLSelect from "./URLSelect.svelte"
-import StringFieldSelect from "./StringFieldSelect.svelte"
-import NumberFieldSelect from "./NumberFieldSelect.svelte"
-import OptionsFieldSelect from "./OptionsFieldSelect.svelte"
-import BooleanFieldSelect from "./BooleanFieldSelect.svelte"
-import LongFormFieldSelect from "./LongFormFieldSelect.svelte"
-import DateTimeFieldSelect from "./DateTimeFieldSelect.svelte"
-import AttachmentFieldSelect from "./AttachmentFieldSelect.svelte"
-import RelationshipFieldSelect from "./RelationshipFieldSelect.svelte"
+import FormFieldSelect from "./FormFieldSelect.svelte"
+import ValidationEditor from "./ValidationEditor/ValidationEditor.svelte"
 
 const componentMap = {
   text: Input,
@@ -39,14 +33,22 @@ const componentMap = {
   navigation: NavigationEditor,
   filter: FilterEditor,
   url: URLSelect,
-  "field/string": StringFieldSelect,
-  "field/number": NumberFieldSelect,
-  "field/options": OptionsFieldSelect,
-  "field/boolean": BooleanFieldSelect,
-  "field/longform": LongFormFieldSelect,
-  "field/datetime": DateTimeFieldSelect,
-  "field/attachment": AttachmentFieldSelect,
-  "field/link": RelationshipFieldSelect,
+  "field/string": FormFieldSelect,
+  "field/number": FormFieldSelect,
+  "field/options": FormFieldSelect,
+  "field/boolean": FormFieldSelect,
+  "field/longform": FormFieldSelect,
+  "field/datetime": FormFieldSelect,
+  "field/attachment": FormFieldSelect,
+  "field/link": FormFieldSelect,
+  // Some validation types are the same as others, so not all types are
+  // explicitly listed here. e.g. options uses string validation
+  "validation/string": ValidationEditor,
+  "validation/number": ValidationEditor,
+  "validation/boolean": ValidationEditor,
+  "validation/datetime": ValidationEditor,
+  "validation/attachment": ValidationEditor,
+  "validation/link": ValidationEditor,
 }
 
 export const getComponentForSettingType = type => {
diff --git a/packages/standard-components/manifest.json b/packages/standard-components/manifest.json
index a45283d63..1b7a09cde 100644
--- a/packages/standard-components/manifest.json
+++ b/packages/standard-components/manifest.json
@@ -1796,6 +1796,11 @@
         "label": "Disabled",
         "key": "disabled",
         "defaultValue": false
+      },
+      {
+        "type": "validation/string",
+        "label": "Validation",
+        "key": "validation"
       }
     ]
   },
@@ -1830,6 +1835,11 @@
         "label": "Disabled",
         "key": "disabled",
         "defaultValue": false
+      },
+      {
+        "type": "validation/number",
+        "label": "Validation",
+        "key": "validation"
       }
     ]
   },
@@ -1864,6 +1874,11 @@
         "label": "Disabled",
         "key": "disabled",
         "defaultValue": false
+      },
+      {
+        "type": "validation/string",
+        "label": "Validation",
+        "key": "validation"
       }
     ]
   },
@@ -1915,6 +1930,11 @@
         "label": "Disabled",
         "key": "disabled",
         "defaultValue": false
+      },
+      {
+        "type": "validation/string",
+        "label": "Validation",
+        "key": "validation"
       }
     ]
   },
@@ -1972,6 +1992,11 @@
         "label": "Disabled",
         "key": "disabled",
         "defaultValue": false
+      },
+      {
+        "type": "validation/boolean",
+        "label": "Validation",
+        "key": "validation"
       }
     ]
   },
@@ -2007,6 +2032,11 @@
         "label": "Disabled",
         "key": "disabled",
         "defaultValue": false
+      },
+      {
+        "type": "validation/string",
+        "label": "Validation",
+        "key": "validation"
       }
     ]
   },
@@ -2047,6 +2077,11 @@
         "label": "Disabled",
         "key": "disabled",
         "defaultValue": false
+      },
+      {
+        "type": "validation/datetime",
+        "label": "Validation",
+        "key": "validation"
       }
     ]
   },
@@ -2071,6 +2106,11 @@
         "label": "Disabled",
         "key": "disabled",
         "defaultValue": false
+      },
+      {
+        "type": "validation/attachment",
+        "label": "Validation",
+        "key": "validation"
       }
     ]
   },
@@ -2100,6 +2140,11 @@
         "label": "Disabled",
         "key": "disabled",
         "defaultValue": false
+      },
+      {
+        "type": "validation/link",
+        "label": "Validation",
+        "key": "validation"
       }
     ]
   },
diff --git a/packages/standard-components/src/forms/AttachmentField.svelte b/packages/standard-components/src/forms/AttachmentField.svelte
index 0b454f980..f2c4a3503 100644
--- a/packages/standard-components/src/forms/AttachmentField.svelte
+++ b/packages/standard-components/src/forms/AttachmentField.svelte
@@ -6,6 +6,7 @@
   export let field
   export let label
   export let disabled = false
+  export let validation
 
   let fieldState
   let fieldApi
@@ -35,6 +36,7 @@
   {label}
   {field}
   {disabled}
+  {validation}
   type="attachment"
   bind:fieldState
   bind:fieldApi
@@ -44,6 +46,7 @@
     <CoreDropzone
       value={$fieldState.value}
       disabled={$fieldState.disabled}
+      error={$fieldState.error}
       on:change={e => {
         fieldApi.setValue(e.detail)
       }}
diff --git a/packages/standard-components/src/forms/BooleanField.svelte b/packages/standard-components/src/forms/BooleanField.svelte
index e9eb57d30..d8507b8a0 100644
--- a/packages/standard-components/src/forms/BooleanField.svelte
+++ b/packages/standard-components/src/forms/BooleanField.svelte
@@ -7,6 +7,7 @@
   export let text
   export let disabled = false
   export let size
+  export let validation
   export let defaultValue
 
   let fieldState
@@ -30,6 +31,7 @@
   {label}
   {field}
   {disabled}
+  {validation}
   defaultValue={isTruthy(defaultValue)}
   type="boolean"
   bind:fieldState
diff --git a/packages/standard-components/src/forms/DateTimeField.svelte b/packages/standard-components/src/forms/DateTimeField.svelte
index 87089114f..bd26e3995 100644
--- a/packages/standard-components/src/forms/DateTimeField.svelte
+++ b/packages/standard-components/src/forms/DateTimeField.svelte
@@ -7,6 +7,7 @@
   export let placeholder
   export let disabled = false
   export let enableTime = false
+  export let validation
   export let defaultValue
 
   let fieldState
@@ -42,6 +43,7 @@
   {label}
   {field}
   {disabled}
+  {validation}
   defaultValue={parseDate(defaultValue)}
   type="datetime"
   bind:fieldState
diff --git a/packages/standard-components/src/forms/Field.svelte b/packages/standard-components/src/forms/Field.svelte
index fd632c32d..5de84f677 100644
--- a/packages/standard-components/src/forms/Field.svelte
+++ b/packages/standard-components/src/forms/Field.svelte
@@ -11,6 +11,7 @@
   export let defaultValue
   export let type
   export let disabled = false
+  export let validation
 
   // Get contexts
   const formContext = getContext("form")
@@ -21,13 +22,21 @@
   // Register field with form
   const formApi = formContext?.formApi
   const labelPosition = fieldGroupContext?.labelPosition || "above"
-  const formField = formApi?.registerField(field, defaultValue, disabled)
+  const formField = formApi?.registerField(
+    field,
+    defaultValue,
+    disabled,
+    validation
+  )
 
   // Expose field properties to parent component
   fieldState = formField?.fieldState
   fieldApi = formField?.fieldApi
   fieldSchema = formField?.fieldSchema
 
+  // Keep validation rules up to date
+  $: fieldApi?.updateValidation(validation)
+
   // Extract label position from field group context
   $: labelPositionClass =
     labelPosition === "above" ? "" : `spectrum-FieldLabel--${labelPosition}`
diff --git a/packages/standard-components/src/forms/InnerForm.svelte b/packages/standard-components/src/forms/InnerForm.svelte
index 64901d191..eea2e6ebf 100644
--- a/packages/standard-components/src/forms/InnerForm.svelte
+++ b/packages/standard-components/src/forms/InnerForm.svelte
@@ -21,7 +21,12 @@
 
   // Form API contains functions to control the form
   const formApi = {
-    registerField: (field, defaultValue = null, fieldDisabled = false) => {
+    registerField: (
+      field,
+      defaultValue = null,
+      fieldDisabled = false,
+      validationRules
+    ) => {
       if (!field) {
         return
       }
@@ -30,17 +35,23 @@
       const isAutoColumn = !!schema?.[field]?.autocolumn
 
       // Create validation function based on field schema
-      const constraints = schema?.[field]?.constraints
-      const validate = createValidatorFromConstraints(constraints, field, table)
+      const schemaConstraints = schema?.[field]?.constraints
+      const validator = createValidatorFromConstraints(
+        schemaConstraints,
+        validationRules,
+        field,
+        table
+      )
 
       // Construct field object
       fieldMap[field] = {
         fieldState: makeFieldState(
           field,
+          validator,
           defaultValue,
           disabled || fieldDisabled || isAutoColumn
         ),
-        fieldApi: makeFieldApi(field, defaultValue, validate),
+        fieldApi: makeFieldApi(field, defaultValue),
         fieldSchema: schema?.[field] ?? {},
       }
 
@@ -83,9 +94,11 @@
   ]
 
   // Creates an API for a specific field
-  const makeFieldApi = (field, defaultValue, validate) => {
+  const makeFieldApi = field => {
+    // Sets the value for a certain field and invokes validation
     const setValue = (value, skipCheck = false) => {
       const { fieldState } = fieldMap[field]
+      const { validator } = get(fieldState)
 
       // Skip if the value is the same
       if (!skipCheck && get(fieldState).value === value) {
@@ -93,7 +106,7 @@
       }
 
       // Update field state
-      const error = validate ? validate(value) : null
+      const error = validator ? validator(value) : null
       fieldState.update(state => {
         state.value = value
         state.error = error
@@ -115,15 +128,20 @@
       return !error
     }
 
+    // Clears the value of a certain field back to the initial value
     const clearValue = () => {
       const { fieldState } = fieldMap[field]
+      const { defaultValue } = get(fieldState)
       const newValue = initialValues[field] ?? defaultValue
+
+      // Update field state
       fieldState.update(state => {
         state.value = newValue
         state.error = null
         return state
       })
 
+      // Update form state
       formState.update(state => {
         state.values = { ...state.values, [field]: newValue }
         delete state.errors[field]
@@ -132,9 +150,37 @@
       })
     }
 
+    // Updates the validator rules for a certain field
+    const updateValidation = validationRules => {
+      const { fieldState } = fieldMap[field]
+      const { value, error } = get(fieldState)
+
+      // Create new validator
+      const schemaConstraints = schema?.[field]?.constraints
+      const validator = createValidatorFromConstraints(
+        schemaConstraints,
+        validationRules,
+        field,
+        table
+      )
+
+      // Update validator
+      fieldState.update(state => {
+        state.validator = validator
+        return state
+      })
+
+      // If there is currently an error, run the validator again in case
+      // the error should be cleared by the new validation rules
+      if (error) {
+        setValue(value, true)
+      }
+    }
+
     return {
       setValue,
       clearValue,
+      updateValidation,
       validate: () => {
         const { fieldState } = fieldMap[field]
         setValue(get(fieldState).value, true)
@@ -143,13 +189,15 @@
   }
 
   // Creates observable state data about a specific field
-  const makeFieldState = (field, defaultValue, fieldDisabled) => {
+  const makeFieldState = (field, validator, defaultValue, fieldDisabled) => {
     return writable({
       field,
       fieldId: `id-${generateID()}`,
       value: initialValues[field] ?? defaultValue,
       error: null,
       disabled: fieldDisabled,
+      defaultValue,
+      validator,
     })
   }
 
diff --git a/packages/standard-components/src/forms/LongFormField.svelte b/packages/standard-components/src/forms/LongFormField.svelte
index 231c24719..f71090425 100644
--- a/packages/standard-components/src/forms/LongFormField.svelte
+++ b/packages/standard-components/src/forms/LongFormField.svelte
@@ -6,6 +6,7 @@
   export let label
   export let placeholder
   export let disabled = false
+  export let validation
   export let defaultValue = ""
 
   let fieldState
@@ -16,6 +17,7 @@
   {label}
   {field}
   {disabled}
+  {validation}
   {defaultValue}
   type="longform"
   bind:fieldState
diff --git a/packages/standard-components/src/forms/OptionsField.svelte b/packages/standard-components/src/forms/OptionsField.svelte
index 18debfb23..04bb58219 100644
--- a/packages/standard-components/src/forms/OptionsField.svelte
+++ b/packages/standard-components/src/forms/OptionsField.svelte
@@ -7,6 +7,7 @@
   export let placeholder
   export let disabled = false
   export let optionsType = "select"
+  export let validation
   export let defaultValue
 
   let fieldState
@@ -18,6 +19,7 @@
   {field}
   {label}
   {disabled}
+  {validation}
   {defaultValue}
   type="options"
   bind:fieldState
diff --git a/packages/standard-components/src/forms/RelationshipField.svelte b/packages/standard-components/src/forms/RelationshipField.svelte
index b695994e7..f7d6581c7 100644
--- a/packages/standard-components/src/forms/RelationshipField.svelte
+++ b/packages/standard-components/src/forms/RelationshipField.svelte
@@ -9,6 +9,7 @@
   export let label
   export let placeholder
   export let disabled = false
+  export let validation
 
   let fieldState
   let fieldApi
@@ -64,6 +65,7 @@
   {label}
   {field}
   {disabled}
+  {validation}
   type="link"
   bind:fieldState
   bind:fieldApi
diff --git a/packages/standard-components/src/forms/StringField.svelte b/packages/standard-components/src/forms/StringField.svelte
index be58d458e..f04177ec0 100644
--- a/packages/standard-components/src/forms/StringField.svelte
+++ b/packages/standard-components/src/forms/StringField.svelte
@@ -7,6 +7,7 @@
   export let placeholder
   export let type = "text"
   export let disabled = false
+  export let validation
   export let defaultValue = ""
 
   let fieldState
@@ -17,6 +18,7 @@
   {label}
   {field}
   {disabled}
+  {validation}
   {defaultValue}
   type={type === "number" ? "number" : "string"}
   bind:fieldState
diff --git a/packages/standard-components/src/forms/validation.js b/packages/standard-components/src/forms/validation.js
index b1df80509..30b6fd7ca 100644
--- a/packages/standard-components/src/forms/validation.js
+++ b/packages/standard-components/src/forms/validation.js
@@ -1,54 +1,108 @@
 import flatpickr from "flatpickr"
 
-export const createValidatorFromConstraints = (constraints, field, table) => {
-  let checks = []
+/**
+ * Creates a validation function from a combination of schema-level constraints
+ * and custom validation rules
+ * @param schemaConstraints any schema level constraints from the table
+ * @param customRules any custom validation rules
+ * @param field the field name we are evaluating
+ * @param table the definition of the table we are evaluating
+ * @returns {function} a validator function which accepts test values
+ */
+export const createValidatorFromConstraints = (
+  schemaConstraints,
+  customRules,
+  field,
+  table
+) => {
+  let rules = []
 
-  if (constraints) {
+  // Convert schema constraints into validation rules
+  if (schemaConstraints) {
     // Required constraint
     if (
       field === table?.primaryDisplay ||
-      constraints.presence?.allowEmpty === false
+      schemaConstraints.presence?.allowEmpty === false
     ) {
-      checks.push(presenceConstraint)
+      rules.push({
+        type: "string",
+        constraint: "required",
+        error: "Required",
+      })
     }
 
     // String length constraint
-    if (exists(constraints.length?.maximum)) {
-      const length = constraints.length.maximum
-      checks.push(lengthConstraint(length))
+    if (exists(schemaConstraints.length?.maximum)) {
+      const length = schemaConstraints.length.maximum
+      rules.push({
+        type: "string",
+        constraint: "length",
+        value: length,
+        error: `Maximum length is ${length}`,
+      })
     }
 
     // Min / max number constraint
-    if (exists(constraints.numericality?.greaterThanOrEqualTo)) {
-      const min = constraints.numericality.greaterThanOrEqualTo
-      checks.push(numericalConstraint(x => x >= min, `Minimum value is ${min}`))
+    if (exists(schemaConstraints.numericality?.greaterThanOrEqualTo)) {
+      const min = schemaConstraints.numericality.greaterThanOrEqualTo
+      rules.push({
+        type: "number",
+        constraint: "minValue",
+        value: min,
+        error: `Minimum value is ${min}`,
+      })
     }
-    if (exists(constraints.numericality?.lessThanOrEqualTo)) {
-      const max = constraints.numericality.lessThanOrEqualTo
-      checks.push(numericalConstraint(x => x <= max, `Maximum value is ${max}`))
+    if (exists(schemaConstraints.numericality?.lessThanOrEqualTo)) {
+      const max = schemaConstraints.numericality.lessThanOrEqualTo
+      rules.push({
+        type: "number",
+        constraint: "maxValue",
+        value: max,
+        error: `Maximum value is ${max}`,
+      })
     }
 
     // Inclusion constraint
-    if (exists(constraints.inclusion)) {
-      const options = constraints.inclusion
-      checks.push(inclusionConstraint(options))
+    if (exists(schemaConstraints.inclusion)) {
+      const options = schemaConstraints.inclusion || []
+      rules.push({
+        type: "string",
+        constraint: "inclusion",
+        value: options,
+        error: "Invalid value",
+      })
     }
 
     // Date constraint
-    if (exists(constraints.datetime?.earliest)) {
-      const limit = constraints.datetime.earliest
-      checks.push(dateConstraint(limit, true))
+    if (exists(schemaConstraints.datetime?.earliest)) {
+      const limit = schemaConstraints.datetime.earliest
+      const limitString = flatpickr.formatDate(new Date(limit), "F j Y, H:i")
+      rules.push({
+        type: "datetime",
+        constraint: "minValue",
+        value: limit,
+        error: `Earliest date is ${limitString}`,
+      })
     }
-    if (exists(constraints.datetime?.latest)) {
-      const limit = constraints.datetime.latest
-      checks.push(dateConstraint(limit, false))
+    if (exists(schemaConstraints.datetime?.latest)) {
+      const limit = schemaConstraints.datetime.latest
+      const limitString = flatpickr.formatDate(new Date(limit), "F j Y, H:i")
+      rules.push({
+        type: "datetime",
+        constraint: "maxValue",
+        value: limit,
+        error: `Latest date is ${limitString}`,
+      })
     }
   }
 
+  // Add custom validation rules
+  rules = rules.concat(customRules || [])
+
   // Evaluate each constraint
   return value => {
-    for (let check of checks) {
-      const error = check(value)
+    for (let rule of rules) {
+      const error = evaluateRule(rule, value)
       if (error) {
         return error
       }
@@ -57,61 +111,197 @@ export const createValidatorFromConstraints = (constraints, field, table) => {
   }
 }
 
-const exists = value => value != null && value !== ""
-
-const presenceConstraint = value => {
-  let invalid
-  if (Array.isArray(value)) {
-    invalid = value.length === 0
-  } else {
-    invalid = value == null || value === ""
+/**
+ * Evaluates a validation rule against a value and optionally returns
+ * an error if the validation fails.
+ * @param rule the rule object to evaluate
+ * @param value the value to validate against
+ * @returns {null|*} an error if validation fails or null if it passes
+ */
+const evaluateRule = (rule, value) => {
+  if (!rule) {
+    return null
   }
-  return invalid ? "Required" : null
-}
 
-const lengthConstraint = maxLength => value => {
-  if (value && value.length > maxLength) {
-    return `Maximum ${maxLength} characters`
+  // Determine the correct handler for this rule
+  const handler = handlerMap[rule.constraint]
+  if (!handler) {
+    return null
   }
-  return null
+
+  // Coerce input value into correct type
+  value = parseType(value, rule.type)
+
+  // Evaluate the rule
+  const pass = handler(value, rule)
+  return pass ? null : rule.error || "Error"
 }
 
-const numericalConstraint = (constraint, error) => value => {
-  if (value == null || value === "") {
+/**
+ * Parses a value to the specified type so that values are always compared
+ * in the same format.
+ * @param value the value to parse
+ * @param type the type to parse
+ * @returns {boolean|string|*|number|null} the parsed value, or null if invalid
+ */
+const parseType = (value, type) => {
+  // Treat nulls or empty strings as null
+  if (!exists(value) || !type) {
     return null
   }
-  if (isNaN(value)) {
-    return "Must be a number"
-  }
-  const number = parseFloat(value)
-  if (!constraint(number)) {
-    return error
+
+  // Parse as string
+  if (type === "string") {
+    if (typeof value === "string" || Array.isArray(value)) {
+      return value
+    }
+    if (value.length === 0) {
+      return null
+    }
+    return `${value}`
   }
-  return null
-}
 
-const inclusionConstraint =
-  (options = []) =>
-  value => {
-    if (value == null || value === "") {
+  // Parse as number
+  if (type === "number") {
+    if (isNaN(value)) {
       return null
     }
-    if (!options.includes(value)) {
-      return "Invalid value"
+    return parseFloat(value)
+  }
+
+  // Parse as date
+  if (type === "datetime") {
+    if (value instanceof Date) {
+      return value.getTime()
     }
-    return null
+    const time = isNaN(value) ? Date.parse(value) : new Date(value).getTime()
+    return isNaN(time) ? null : time
   }
 
-const dateConstraint = (dateString, isEarliest) => {
-  const dateLimit = Date.parse(dateString)
-  return value => {
-    if (value == null || value === "") {
+  // Parse as boolean
+  if (type === "boolean") {
+    if (typeof value === "string") {
+      return value.toLowerCase() === "true"
+    }
+    return value === true
+  }
+
+  // Parse attachments, treating no elements as null
+  if (type === "attachment") {
+    if (!Array.isArray(value) || !value.length) {
       return null
     }
-    const dateValue = Date.parse(value)
-    const valid = isEarliest ? dateValue >= dateLimit : dateValue <= dateLimit
-    const adjective = isEarliest ? "Earliest" : "Latest"
-    const limitString = flatpickr.formatDate(new Date(dateLimit), "F j Y, H:i")
-    return valid ? null : `${adjective} is ${limitString}`
+    return value
   }
+
+  // Parse links, treating no elements as null
+  if (type === "link") {
+    if (!Array.isArray(value) || !value.length) {
+      return null
+    }
+    return value
+  }
+
+  // If some unknown type, treat as null to avoid breaking validators
+  return null
+}
+
+// Evaluates a required constraint
+const requiredHandler = value => {
+  return value != null
+}
+
+// Evaluates a min length constraint
+const minLengthHandler = (value, rule) => {
+  const limit = parseType(rule.value, "number")
+  return value && value.length >= limit
+}
+
+// Evaluates a max length constraint
+const maxLengthHandler = (value, rule) => {
+  const limit = parseType(rule.value, "number")
+  return value == null || value.length <= limit
+}
+
+// Evaluates a min value constraint
+const minValueHandler = (value, rule) => {
+  // Use same type as the value so that things can be compared
+  const limit = parseType(rule.value, rule.type)
+  return value && value >= limit
+}
+
+// Evaluates a max value constraint
+const maxValueHandler = (value, rule) => {
+  // Use same type as the value so that things can be compared
+  const limit = parseType(rule.value, rule.type)
+  return value == null || value <= limit
+}
+
+// Evaluates an inclusion constraint
+const inclusionHandler = (value, rule) => {
+  return value == null || rule.value.includes(value)
+}
+
+// Evaluates an equal constraint
+const equalHandler = (value, rule) => {
+  const ruleValue = parseType(rule.value, rule.type)
+  return value === ruleValue
+}
+
+// Evaluates a not equal constraint
+const notEqualHandler = (value, rule) => {
+  const ruleValue = parseType(rule.value, rule.type)
+  if (value == null && ruleValue == null) {
+    return true
+  }
+  return value !== ruleValue
+}
+
+// Evaluates a regex constraint
+const regexHandler = (value, rule) => {
+  const regex = parseType(rule.value, "string")
+  return new RegExp(regex).test(value)
+}
+
+// Evaluates a not regex constraint
+const notRegexHandler = (value, rule) => {
+  return !regexHandler(value, rule)
+}
+
+// Evaluates a contains constraint
+const containsHandler = (value, rule) => {
+  const expectedValue = parseType(rule.value, "string")
+  return value && value.includes(expectedValue)
+}
+
+// Evaluates a not contains constraint
+const notContainsHandler = (value, rule) => {
+  return !containsHandler(value, rule)
+}
+
+/**
+ * Map of constraint types to handlers.
+ */
+const handlerMap = {
+  required: requiredHandler,
+  minLength: minLengthHandler,
+  maxLength: maxLengthHandler,
+  minValue: minValueHandler,
+  maxValue: maxValueHandler,
+  inclusion: inclusionHandler,
+  equal: equalHandler,
+  notEqual: notEqualHandler,
+  regex: regexHandler,
+  notRegex: notRegexHandler,
+  contains: containsHandler,
+  notContains: notContainsHandler,
+}
+
+/**
+ * Helper to check for null, undefined or empty string values
+ * @param value the value to test
+ * @returns {boolean} whether the value exists or not
+ */
+const exists = value => {
+  return value != null && value !== ""
 }