container components need `children: true`

packages/builder/src/components/userInterface/pagesParsing/createProps.js

@@ -48,7 +48,7 @@ export const createProps = (componentDefinition, derivedFromProps) => {
     assign(props, derivedFromProps)
   }
 
-  if (componentDefinition.children !== false && isUndefined(props._children)) {
+  if (componentDefinition.children && isUndefined(props._children)) {
     props._children = []
   }
 

packages/builder/tests/createProps.spec.js

@@ -18,7 +18,7 @@ describe("createDefaultProps", () => {
     expect(props.fieldName).toBeDefined()
     expect(props.fieldName).toBe("something")
     stripStandardProps(props)
-    expect(keys(props).length).toBe(3)
+    expect(keys(props).length).toBe(2)
   })
 
   it("should set component _component", () => {
@@ -104,14 +104,13 @@ describe("createDefaultProps", () => {
     expect(props._children).toEqual([])
   })
 
-  it("should create a _children array when children not defined ", () => {
+  it("should not create a _children array when children not defined ", () => {
     const comp = getcomponent()
 
     const { props, errors } = createProps(comp)
 
     expect(errors).toEqual([])
-    expect(props._children).toBeDefined()
-    expect(props._children).toEqual([])
+    expect(props._children).not.toBeDefined()
   })
 
   it("should not create _children array when children=false ", () => {

packages/standard-components/components.json

@@ -244,6 +244,7 @@
 	},
 	"list": {
 		"description": "A configurable data list that attaches to your backend models.",
+		"children": true,
 		"data": true,
 		"props": {
 			"model": "models"
@@ -263,6 +264,7 @@
 	},
 	"recorddetail": {
 		"description": "Loads a record, using an ID in the url",
+		"children": true,
 		"data": true,
 		"props": {
 			"model": "models"
@@ -599,6 +601,7 @@
 	},
 	"container": {
 		"name": "Container",
+		"children": true,
 		"description": "An element that contains and lays out other elements. e.g. <div>, <header> etc",
 		"props": {
 			"className": "string",