fix: multipart array sample generation for items (#6461)

* json schema array component should use schema to generate example in case of array items.
* empty value checkbox should be disabled if not empty => not empty list || not empty string
* curl should also check for not empty list

src/core/json-schema-components.jsx

@@ -4,7 +4,7 @@ import { List, fromJS } from "immutable"
 import cx from "classnames"
 import ImPropTypes from "react-immutable-proptypes"
 import DebounceInput from "react-debounce-input"
-import { stringify } from "core/utils"
+import { stringify, getSampleSchema } from "core/utils"
 //import "less/json-schema-form"
 
 const noop = ()=> {}
@@ -125,12 +125,15 @@ export class JsonSchema_array extends PureComponent {
 
   constructor(props, context) {
     super(props, context)
-    this.state = { value: valueOrEmptyList(props.value) }
+    this.state = { value: valueOrEmptyList(props.value), schema: props.schema}
   }
 
   componentWillReceiveProps(props) {
     if(props.value !== this.state.value)
       this.setState({ value: props.value })
+
+    if(props.schema !== this.state.schema)
+      this.setState({ schema: props.schema })
   }
 
   onChange = () => {
@@ -152,7 +155,9 @@ export class JsonSchema_array extends PureComponent {
   addItem = () => {
     let newValue = valueOrEmptyList(this.state.value)
     this.setState(() => ({
-      value: newValue.push("")
+      value: newValue.push(getSampleSchema(this.state.schema.get("items"), false, {
+        includeWriteOnly: true
+      }))
     }), this.onChange)
   }
 

src/core/plugins/oas3/components/request-body.jsx

@@ -145,10 +145,14 @@ const RequestBody = ({
 
               let initialValue = prop.get("default") || prop.get("example") || ""
 
-              if (initialValue === "" && type === "object") {
-                initialValue = getSampleSchema(prop, false, {
-                  includeWriteOnly: true
-                })
+              if (initialValue === "") {
+                if(type === "object") {
+                  initialValue = getSampleSchema(prop, false, {
+                    includeWriteOnly: true
+                  })
+                } else if(type === "array") {
+                  initialValue = []
+                }
               }
 
               if (typeof initialValue !== "string" && type === "object") {
@@ -193,7 +197,7 @@ const RequestBody = ({
                               onChange={(value) => onChangeIncludeEmpty(key, value)}
                               isIncluded={requestBodyInclusionSetting.get(key) || false}
                               isIncludedOptions={setIsIncludedOptions(key)}
-                              isDisabled={!isEmptyValue(currentValue)}
+                              isDisabled={Array.isArray(currentValue) ? currentValue.length !== 0 : !isEmptyValue(currentValue)}
                             />
                           )}
                         </div> : null }

src/core/plugins/spec/actions.js

@@ -416,7 +416,10 @@ export const executeRequest = (req) =>
             }
           )
           .filter(
-            (value, key) => !isEmptyValue(value) || requestBodyInclusionSetting.get(key)
+            (value, key) => (Array.isArray(value) 
+              ? value.length !== 0 
+              : !isEmptyValue(value)
+            ) || requestBodyInclusionSetting.get(key)
           )
           .toJS()
       } else{