fix: support anyOf inside allOf

index.js

@@ -76,6 +76,7 @@ function build (schema, options) {
     functionsCounter: 0,
     functionsNamesBySchema: new Map(),
     options,
+    wrapObjects: true,
     refResolver: new RefResolver(),
     rootSchemaId: schema.$id || randomUUID(),
     validatorSchemasIds: new Set()
@@ -510,13 +511,16 @@ function buildObject (context, location) {
 
   functionCode += `
       const obj = ${toJSON('input')}
-      let json = '{'
+      let json = '${context.wrapObjects ? '{' : ''}'
       let addComma = false
   `
 
+  const wrapObjects = context.wrapObjects
+  context.wrapObjects = true
   functionCode += buildInnerObject(context, location)
+  context.wrapObjects = wrapObjects
   functionCode += `
-      return json + '}'
+      return json${context.wrapObjects ? ' + \'}\'' : ''}
     }
   `
 
@@ -832,9 +836,19 @@ function buildValue (context, location, input) {
 
   let code = ''
 
-  if (type === undefined && (schema.anyOf || schema.oneOf)) {
+  if ((type === undefined || type === 'object') && (schema.anyOf || schema.oneOf)) {
     context.validatorSchemasIds.add(location.getSchemaId())
 
+    if (schema.type === 'object') {
+      context.wrapObjects = false
+      const funcName = buildObject(context, location)
+      code += `
+        json += '{'
+        json += ${funcName}(${input})
+        json += ','
+      `
+    }
+
     const type = schema.anyOf ? 'anyOf' : 'oneOf'
     const anyOfLocation = location.getPropertyLocation(type)
 
@@ -856,6 +870,12 @@ function buildValue (context, location, input) {
     code += `
       else throw new TypeError(\`The value of '${schemaRef}' does not match schema definition.\`)
     `
+    if (schema.type === 'object') {
+      code += `
+        json += '}'
+      `
+      context.wrapObjects = true
+    }
     return code
   }
 

test/allof.test.js

@@ -220,6 +220,75 @@ test('object with nested allOfs', (t) => {
   t.equal(value, '{"id1":1,"id2":2,"id3":3}')
 })
 
+test('object with anyOf nested inside allOf', (t) => {
+  t.plan(1)
+
+  const schema = {
+    title: 'object with anyOf nested inside allOf',
+    type: 'object',
+    allOf: [
+      {
+        required: ['id1', 'obj'],
+        type: 'object',
+        properties: {
+          id1: {
+            type: 'integer'
+          },
+          obj: {
+            type: 'object',
+            properties: {
+              nested: { type: 'string' }
+            }
+          }
+        }
+      },
+      {
+        anyOf: [
+          {
+            type: 'object',
+            properties: {
+              id2: { type: 'string' }
+            },
+            required: ['id2']
+          },
+          {
+            type: 'object',
+            properties: {
+              id3: {
+                type: 'integer'
+              },
+              nestedObj: {
+                type: 'object',
+                properties: {
+                  nested: { type: 'string' }
+                }
+              }
+            },
+            required: ['id3']
+          },
+          {
+            type: 'object',
+            properties: {
+              id4: { type: 'integer' }
+            },
+            required: ['id4']
+          }
+        ]
+      }
+    ]
+  }
+
+  const stringify = build(schema)
+  const value = stringify({
+    id1: 1,
+    id3: 3,
+    id4: 4, // extra prop shouldn't be in result
+    obj: { nested: 'yes' },
+    nestedObj: { nested: 'yes' }
+  })
+  t.equal(value, '{"id1":1,"obj":{"nested":"yes"},"id3":3,"nestedObj":{"nested":"yes"}}')
+})
+
 test('object with $ref in allOf', (t) => {
   t.plan(1)