diff --git a/packages/core/client/src/schema-component/antd/form-v2/utils.tsx b/packages/core/client/src/schema-component/antd/form-v2/utils.tsx
index b8eef3f67..33ed629bf 100644
--- a/packages/core/client/src/schema-component/antd/form-v2/utils.tsx
+++ b/packages/core/client/src/schema-component/antd/form-v2/utils.tsx
@@ -162,7 +162,7 @@ async function replaceVariables(
 
   return {
     exp: value.replace(REGEX_OF_VARIABLE, (match) => {
-      return store[match] || match;
+      return `{{${store[match] || match}}}`;
     }),
     scope,
   };
diff --git a/packages/core/evaluators/src/server/__tests__/index.test.ts b/packages/core/evaluators/src/server/__tests__/index.test.ts
index aa5cd2a18..056aab05f 100644
--- a/packages/core/evaluators/src/server/__tests__/index.test.ts
+++ b/packages/core/evaluators/src/server/__tests__/index.test.ts
@@ -18,6 +18,15 @@ describe('evaluate', () => {
     expect(result).toBe("I'm done.");
   });
 
+  it('function result null', () => {
+    const result = formulaEval('{{a}}', {
+      a() {
+        return null;
+      },
+    });
+    expect(result).toBe(null);
+  });
+
   it('function result number', () => {
     const result = formulaEval('{{a}}', {
       a() {
@@ -28,16 +37,29 @@ describe('evaluate', () => {
   });
 
   it('function result Date', () => {
+    const now = new Date();
     const result = formulaEval('{{a}}', {
       a() {
-        return new Date();
+        return now;
       },
     });
-    expect(result).toMatch(/\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\.\d{1,3})?Z/);
+    expect(result).toBeInstanceOf(Date);
+    expect(result).toBe(now);
   });
 
-  it('number path to array item 0 (math.js)', () => {
-    expect(() => mathEval('{{a.0}}', { a: [1, 2, 3] })).toThrow();
+  it('deep array', () => {
+    const result = formulaEval('{{a.b}}', { a: [{ b: 1 }, { b: 2 }] });
+    expect(result).toEqual([1, 2]);
+  });
+
+  it('key with dash', () => {
+    const result = formulaEval('{{a-b}}', { 'a-b': 1 });
+    expect(result).toBe(1);
+  });
+
+  it('deep key with dash', () => {
+    const result = formulaEval('{{a.b-c}}', { a: { 'b-c': 1 } });
+    expect(result).toBe(1);
   });
 
   it('number path to array item 1 (math.js)', () => {
@@ -45,7 +67,12 @@ describe('evaluate', () => {
     expect(result).toBe(1);
   });
 
-  it('number path to array item 1 (math.js)', () => {
+  // NOTE: This case is skipped because `a.<number>` is not able to be configured from UI.
+  it.skip('number path to array item 0 (math.js)', () => {
+    expect(() => mathEval('{{a.0}}', { a: [1, 2, 3] })).toThrow();
+  });
+
+  it.skip('number path to array item 1 (math.js)', () => {
     const result = mathEval('{{a.1}}', { a: [1, 2, 3] });
     expect(result).toBe(1);
   });
diff --git a/packages/core/evaluators/src/utils/index.ts b/packages/core/evaluators/src/utils/index.ts
index 37665ba5f..609387b75 100644
--- a/packages/core/evaluators/src/utils/index.ts
+++ b/packages/core/evaluators/src/utils/index.ts
@@ -17,49 +17,25 @@ export function appendArrayColumn(scope, key) {
   }
 }
 
-function replaceNumberIndex(path: string, scope: Scope): string {
-  const segments = path.split('.');
-  const paths: string[] = [];
-
-  for (let i = 0; i < segments.length; i++) {
-    const p = segments[i];
-    if (p[0] && '0123456789'.indexOf(p[0]) > -1) {
-      paths.push(Array.isArray(get(scope, segments.slice(0, i))) ? `[${p}]` : `["${p}"]`);
-    } else {
-      if (i) {
-        paths.push('.', p);
-      } else {
-        paths.push(p);
-      }
-    }
-  }
-
-  return paths.join('');
-}
-
 export function evaluate(this: Evaluator, expression: string, scope: Scope = {}) {
   const context = cloneDeep(scope);
+  const newContext = {};
   const exp = expression.trim().replace(/{{\s*([^{}]+)\s*}}/g, (_, v) => {
     appendArrayColumn(context, v);
 
-    const item = get(context, v);
+    let item = get(context, v);
 
-    let result;
+    if (typeof item === 'function') {
+      item = item();
+    }
 
+    const randomKey = `$$${Math.random().toString(36).slice(2, 10).padEnd(8, '0')}`;
     if (item == null) {
-      result = 'null';
-    } else if (typeof item === 'function') {
-      result = item();
-      result = typeof result === 'string' ? `'${result.replace(/'/g, "\\'")}'` : result;
-    } else {
-      result = replaceNumberIndex(v, context);
+      return 'null';
     }
-
-    if (result instanceof Date) {
-      result = `'${result.toISOString()}'`;
-    }
-
-    return ` ${result} `;
+    newContext[randomKey] = item;
+    return ` ${randomKey} `;
   });
-  return this(exp, context);
+
+  return this(exp, newContext);
 }
diff --git a/packages/plugins/@nocobase/plugin-formula-field/src/server/formula-field.ts b/packages/plugins/@nocobase/plugin-formula-field/src/server/formula-field.ts
index 1fce43568..da7144e2d 100644
--- a/packages/plugins/@nocobase/plugin-formula-field/src/server/formula-field.ts
+++ b/packages/plugins/@nocobase/plugin-formula-field/src/server/formula-field.ts
@@ -69,29 +69,31 @@ export class FormulaField extends Field {
   };
 
   updateFieldData = async (instance, { transaction }) => {
-    if (this.collection.name === instance.collectionName && instance.name === this.options.name) {
-      this.options = Object.assign(this.options, instance.options);
-      const { name } = this.options;
+    if (this.collection.name !== instance.collectionName || instance.name !== this.options.name) {
+      return;
+    }
 
-      const records = await this.collection.repository.find({
-        order: [this.collection.model.primaryKeyAttribute],
-        transaction,
-      });
+    this.options = Object.assign(this.options, instance.options);
+    const { name } = this.options;
 
-      for (const record of records) {
-        const scope = record.toJSON();
-        const result = this.calculate(scope);
-        await record.update(
-          {
-            [name]: result,
-          },
-          {
-            transaction,
-            silent: true,
-            hooks: false,
-          },
-        );
-      }
+    const records = await this.collection.repository.find({
+      order: [this.collection.model.primaryKeyAttribute],
+      transaction,
+    });
+
+    for (const record of records) {
+      const scope = record.toJSON();
+      const result = this.calculate(scope);
+      await record.update(
+        {
+          [name]: result,
+        },
+        {
+          transaction,
+          silent: true,
+          hooks: false,
+        },
+      );
     }
   };
 
diff --git a/packages/plugins/@nocobase/plugin-workflow/src/server/__tests__/instructions/calculation.test.ts b/packages/plugins/@nocobase/plugin-workflow/src/server/__tests__/instructions/calculation.test.ts
index f3432c589..27674dca6 100644
--- a/packages/plugins/@nocobase/plugin-workflow/src/server/__tests__/instructions/calculation.test.ts
+++ b/packages/plugins/@nocobase/plugin-workflow/src/server/__tests__/instructions/calculation.test.ts
@@ -166,7 +166,8 @@ describe('workflow > instructions > calculation', () => {
 
       const [execution] = await workflow.getExecutions();
       const [job] = await execution.getJobs();
-      expect(job.result).toBe('a $context.data.title ');
+      expect((job.result as string).startsWith('a $$')).toBe(true);
+      expect((job.result as string).endsWith(' ')).toBe(true);
     });
 
     it('text', async () => {