[form-builder] Make ArrayOfPrimitives tolerant of missing value (#496)

sanity-io · Jan 30, 2018 · 003a049 · 003a049
1 parent 84a5eae
commit 003a049
Showing 1 changed file with 8 additions and 5 deletions.
diff --git a/packages/@sanity/form-builder/src/inputs/ArrayOfPrimitives/ArrayOfPrimitives.js b/packages/@sanity/form-builder/src/inputs/ArrayOfPrimitives/ArrayOfPrimitives.js
@@ -52,18 +52,21 @@ export default class ArrayOfPrimitivesInput extends React.PureComponent<Props> {
   }
 
   removeAt(index: number) {
-    this.set(this.props.value.filter((_, i) => i !== index))
+    const {value = []} = this.props
+    this.set(value.filter((_, i) => i !== index))
     this.props.onFocus([Math.max(0, index - 1)])
   }
 
   append(type) {
-    this.set((this.props.value || []).concat(getEmptyValue(type)))
-    this.props.onFocus([this.props.value.length])
+    const {value = [], onFocus} = this.props
+    this.set(value.concat(getEmptyValue(type)))
+    onFocus([value.length])
   }
 
   insertAt(index, type) {
-    this.set(insertAt(this.props.value || [], index, getEmptyValue(type)))
-    this.props.onFocus([index + 1])
+    const {value = [], onFocus} = this.props
+    this.set(insertAt(value, index, getEmptyValue(type)))
+    onFocus([index + 1])
   }
 
   handleRemoveItem = (index: number) => {