Fix #88: Don't crash when data is null for object or array

Author: bhch

src/data.js

@@ -198,6 +198,9 @@ export function getBlankData(schema, getRef) {
 
 
 function getSyncedArray(data, schema, getRef) {
+    if (data === null)
+        data = [];
+
     if (actualType(data) !== 'array')
         throw new Error("Schema expected an 'array' but the data type was '" + actualType(data) + "'");
 
@@ -260,6 +263,9 @@ function getSyncedArray(data, schema, getRef) {
 
 
 function getSyncedObject(data, schema, getRef) {
+    if (data === null)
+        data = {};
+
     if (actualType(data) !== 'object')
         throw new Error("Schema expected an 'object' but the data type was '" + actualType(data) + "'");
 

src/editorState.js

@@ -25,7 +25,7 @@ export default class EditorState {
         if (typeof data === 'string' && data !== '')
             data = JSON.parse(data);
 
-        if (!data) {
+        if (!data && data !== null) {
             // create empty data from schema
             data = getBlankData(schema, (ref) => EditorState.getRef(ref, schema));
         } else {

src/ui.js

@@ -220,6 +220,7 @@ export function getArrayFormRow(args) {
 
     let removable = true;
     let min_items = getKeyword(schema, 'min_items', 'minItems') || 0;
+
     if (data.length <= min_items || isReadonly)
         removable = false;
 
@@ -399,7 +400,6 @@ export function getObjectFormRow(args) {
 
     let keys = [...Object.keys(schema_keys)];
 
-
     if (schema.additionalProperties)
         keys = [...keys, ...Object.keys(data).filter((k) => keys.indexOf(k) === -1)];
 

src/util.js

@@ -163,7 +163,7 @@ export function normalizeKeyword(kw) {
     /* Converts custom supported keywords to standard JSON schema keywords */
 
     if (Array.isArray(kw))
-        kw = kw[0];
+        kw = kw.find((k) => k !== 'null') || 'null';
 
     switch (kw) {
         case 'list': return 'array';