diff --git a/packages/core/utils/src/__tests__/assign.test.ts b/packages/core/utils/src/__tests__/assign.test.ts
index 49b2333656..4c074df5b9 100644
--- a/packages/core/utils/src/__tests__/assign.test.ts
+++ b/packages/core/utils/src/__tests__/assign.test.ts
@@ -25,6 +25,20 @@ describe('merge strategy', () => {
         filter: { a: 'a2' },
       });
     });
+    it('case 1-1', () => {
+      const obj = assign(
+        {
+          filter: { a: 'a2' },
+        },
+        {},
+        {
+          filter: 'andMerge',
+        },
+      );
+      expect(obj).toMatchObject({
+        filter: { a: 'a2' },
+      });
+    });
     it('case 2', () => {
       const obj = assign(
         {
@@ -39,6 +53,20 @@ describe('merge strategy', () => {
         filter: { a: 'a1' },
       });
     });
+    it('case 2-2', () => {
+      const obj = assign(
+        {},
+        {
+          filter: { a: 'a1' },
+        },
+        {
+          filter: 'andMerge',
+        },
+      );
+      expect(obj).toMatchObject({
+        filter: { a: 'a1' },
+      });
+    });
     it('case 3', () => {
       const obj = assign(
         {
@@ -55,6 +83,22 @@ describe('merge strategy', () => {
         filter: { a: 'a1' },
       });
     });
+    it('case 3-2', () => {
+      const obj = assign(
+        {
+          filter: undefined,
+        },
+        {
+          filter: { a: 'a1' },
+        },
+        {
+          filter: 'andMerge',
+        },
+      );
+      expect(obj).toMatchObject({
+        filter: { a: 'a1' },
+      });
+    });
     it('case 4', () => {
       const obj = assign(
         {
@@ -120,6 +164,50 @@ describe('merge strategy', () => {
         filter: { a: 'a1' },
       });
     });
+    it('case 1', () => {
+      const obj = assign(
+        {
+          filter: { a: 'a2' },
+        },
+        {},
+        {
+          filter: 'orMerge',
+        },
+      );
+      expect(obj).toMatchObject({
+        filter: { a: 'a2' },
+      });
+    });
+    it('case 2', () => {
+      const obj = assign(
+        {},
+        {
+          filter: { a: 'a1' },
+        },
+        {
+          filter: 'orMerge',
+        },
+      );
+      expect(obj).toMatchObject({
+        filter: { a: 'a1' },
+      });
+    });
+    it('case 3', () => {
+      const obj = assign(
+        {
+          filter: undefined,
+        },
+        {
+          filter: { a: 'a1' },
+        },
+        {
+          filter: 'orMerge',
+        },
+      );
+      expect(obj).toMatchObject({
+        filter: { a: 'a1' },
+      });
+    });
     it('case 4', () => {
       const obj = assign(
         {
@@ -171,6 +259,20 @@ describe('merge strategy', () => {
         key1: ['val1'],
       });
     });
+    it('case 2', () => {
+      const obj = assign(
+        {},
+        {
+          key1: ['val1'],
+        },
+        {
+          key1: 'intersect',
+        },
+      );
+      expect(obj).toMatchObject({
+        key1: ['val1'],
+      });
+    });
     it('case 3', () => {
       const obj = assign(
         {},
@@ -185,6 +287,20 @@ describe('merge strategy', () => {
         key1: ['val2'],
       });
     });
+    it('case 3', () => {
+      const obj = assign(
+        {
+          key1: ['val2'],
+        },
+        {},
+        {
+          key1: 'intersect',
+        },
+      );
+      expect(obj).toMatchObject({
+        key1: ['val2'],
+      });
+    });
     it('case 4', () => {
       const obj = assign(
         {
@@ -236,6 +352,20 @@ describe('merge strategy', () => {
         key1: ['val1', 'val2'],
       });
     });
+    it('case 2', () => {
+      const obj = assign(
+        {},
+        {
+          key1: ['val1'],
+        },
+        {
+          key1: 'union',
+        },
+      );
+      expect(obj).toMatchObject({
+        key1: ['val1'],
+      });
+    });
     it('case 2', () => {
       const obj = assign(
         {
@@ -264,6 +394,20 @@ describe('merge strategy', () => {
         key1: ['val2'],
       });
     });
+    it('case 3', () => {
+      const obj = assign(
+        {
+          key1: ['val2'],
+        },
+        {},
+        {
+          key1: 'union',
+        },
+      );
+      expect(obj).toMatchObject({
+        key1: ['val2'],
+      });
+    });
     it('case 4', () => {
       const obj = assign(
         {
@@ -364,6 +508,129 @@ describe('merge strategy', () => {
     });
   });
 
+  describe('overwrite', () => {
+    it('case 1', () => {
+      const obj = assign(
+        {
+          key1: 'a',
+        },
+        {
+          key1: 'b',
+        },
+        {
+          key1: 'overwrite',
+        },
+      );
+      expect(obj).toMatchObject({
+        key1: 'b',
+      });
+    });
+    it('case 2', () => {
+      const obj = assign(
+        {
+          key1: 'a',
+        },
+        {},
+        {
+          key1: 'overwrite',
+        },
+      );
+      expect(obj).toMatchObject({
+        key1: 'a',
+      });
+    });
+    it('case 3', () => {
+      const obj = assign(
+        {},
+        {
+          key1: 'a',
+        },
+        {
+          key1: 'overwrite',
+        },
+      );
+      expect(obj).toMatchObject({
+        key1: 'a',
+      });
+    });
+    it('case 4', () => {
+      const obj = assign(
+        {
+          key1: 'a',
+        },
+        {
+          key1: undefined,
+        },
+        {
+          key1: 'overwrite',
+        },
+      );
+      expect(obj).toMatchObject({
+        key1: 'a',
+      });
+    });
+    it('case 5', () => {
+      const obj = assign(
+        {
+          key1: 'a',
+        },
+        {
+          key1: null,
+        },
+        {
+          key1: 'overwrite',
+        },
+      );
+      expect(obj).toMatchObject({
+        key1: null,
+      });
+    });
+    it('case 6', () => {
+      const obj = assign(
+        {
+          key1: 'a',
+        },
+        {
+          key1: '',
+        },
+        {
+          key1: 'overwrite',
+        },
+      );
+      expect(obj).toMatchObject({
+        key1: '',
+      });
+    });
+    it('case 7', () => {
+      const obj = assign(
+        {
+          key1: 'a,b,c',
+        },
+        {},
+        {
+          key1: 'overwrite',
+        },
+      );
+      expect(obj).toMatchObject({
+        key1: ['a', 'b', 'c'],
+      });
+    });
+    it('case 8', () => {
+      const obj = assign(
+        {},
+        {
+          key1: 'a,b,c',
+        },
+        {
+          key1: 'overwrite',
+        },
+      );
+      expect(obj).toMatchObject({
+        key1: ['a', 'b', 'c'],
+      });
+    });
+  });
+
   describe('default = deepmerge', () => {
     it('case 1', () => {
       const obj = assign(
@@ -453,6 +720,11 @@ describe('merge strategy', () => {
           resourceIndex: 'n0jylid5rqa',
           actionName: 'getJsonSchema',
           values: {},
+          sort: 'id',
+          fields: ['id'],
+          except: ['id'],
+          whitelist: ['id1'],
+          blacklist: ['id2'],
         },
         {},
         {
@@ -469,6 +741,11 @@ describe('merge strategy', () => {
         resourceIndex: 'n0jylid5rqa',
         actionName: 'getJsonSchema',
         values: {},
+        sort: 'id',
+        fields: ['id'],
+        except: ['id'],
+        whitelist: ['id1'],
+        blacklist: ['id2'],
       });
     });
   });
diff --git a/packages/core/utils/src/assign.ts b/packages/core/utils/src/assign.ts
index 44a368a0ff..81ad36b314 100644
--- a/packages/core/utils/src/assign.ts
+++ b/packages/core/utils/src/assign.ts
@@ -32,8 +32,14 @@ function getKeys(target: any) {
 
 export const mergeStrategies = new Map<MergeStrategyType, MergeStrategyFunc>();
 
-mergeStrategies.set('overwrite', (_, y) => {
-  if (typeof y === 'string') {
+mergeStrategies.set('overwrite', (x, y) => {
+  if (y === undefined) {
+    if (typeof x === 'string' && x.includes(',')) {
+      return x.split(',');
+    }
+    return x;
+  }
+  if (typeof y === 'string' && y.includes(',')) {
     y = y.split(',');
   }
   return y;