fix no schema bug, feedback from demo

packages/builder/src/components/integration/QueryViewer.svelte

@@ -39,7 +39,7 @@
   let config
   let tab = "JSON"
   let parameters
-  let data
+  let data = []
 
   $: datasource = $backendUiStore.datasources.find(
     ds => ds._id === query.datasourceId
@@ -91,13 +91,20 @@
 
       data = json || []
 
+
+      if (data.length === 0) {
+        notifier.info("Query results empty. Please execute a query with results to create your schema.")
+        return
+      } 
+
+      notifier.success("Query executed successfully.")
+
       // Assume all the fields are strings and create a basic schema
       // from the first record returned by the query
       fields = Object.keys(json[0]).map(field => ({
         name: field,
         type: "STRING",
       }))
-      notifier.success("Query executed successfully.")
     } catch (err) {
       notifier.danger(`Query Error: ${err.message}`)
       console.error(err)
@@ -163,7 +170,7 @@
       <Spacer medium />
 
       <div class="viewer-controls">
-        <Button wide thin blue disabled={!data} on:click={saveQuery}>
+        <Button wide thin blue disabled={data.length === 0} on:click={saveQuery}>
           Save
         </Button>
         <Button wide thin primary on:click={previewQuery}>Run</Button>

packages/server/src/integrations/airtable.js

@@ -2,6 +2,7 @@ const Airtable = require("airtable")
 const { FIELD_TYPES, QUERY_TYPES } = require("./Integration")
 
 const SCHEMA = {
+  docs: "https://airtable.com/api",
   datasource: {
     apiKey: {
       type: FIELD_TYPES.STRING,

packages/server/src/integrations/couchdb.js

@@ -2,6 +2,7 @@ const PouchDB = require("pouchdb")
 const { FIELD_TYPES, QUERY_TYPES } = require("./Integration")
 
 const SCHEMA = {
+  docs: "https://docs.couchdb.org/en/stable/",
   datasource: {
     url: {
       type: FIELD_TYPES.STRING,

packages/server/src/integrations/dynamodb.js

@@ -2,6 +2,7 @@ const AWS = require("aws-sdk")
 const { FIELD_TYPES, QUERY_TYPES } = require("./Integration")
 
 const SCHEMA = {
+  docs: "https://github.com/dabit3/dynamodb-documentclient-cheat-sheet",
   datasource: {
     region: {
       type: FIELD_TYPES.STRING,

packages/server/src/integrations/elasticsearch.js

@@ -2,6 +2,8 @@ const { Client } = require("@elastic/elasticsearch")
 const { QUERY_TYPES, FIELD_TYPES } = require("./Integration")
 
 const SCHEMA = {
+  docs:
+    "https://www.elastic.co/guide/en/elasticsearch/client/javascript-api/current/index.html",
   datasource: {
     url: {
       type: "string",

packages/server/src/integrations/microsoftSqlServer.js

@@ -2,6 +2,7 @@ const sqlServer = require("mssql")
 const { FIELD_TYPES } = require("./Integration")
 
 const SCHEMA = {
+  docs: "https://github.com/tediousjs/node-mssql",
   datasource: {
     user: {
       type: FIELD_TYPES.STRING,

packages/server/src/integrations/mongodb.js

@@ -2,6 +2,7 @@ const { MongoClient } = require("mongodb")
 const { FIELD_TYPES, QUERY_TYPES } = require("./Integration")
 
 const SCHEMA = {
+  docs: "https://github.com/mongodb/node-mongodb-native",
   datasource: {
     connectionString: {
       type: FIELD_TYPES.STRING,

packages/server/src/integrations/postgres.js

@@ -1,6 +1,7 @@
 const { Client } = require("pg")
 
 const SCHEMA = {
+  docs: "https://node-postgres.com",
   datasource: {
     host: {
       type: "string",

packages/server/src/integrations/s3.js

@@ -1,6 +1,7 @@
 const AWS = require("aws-sdk")
 
 const SCHEMA = {
+  docs: "https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/S3.html",
   datasource: {
     region: {
       type: "string",