fix: resolve empty table dropdown issue with dynamic select options in add new row functionality (#37108)

## Description
**Problem**
When using a Table widget's Select column type with dynamic options, the
computed value binding fails to handle empty table states correctly. If
the table has no data (`processedTableData` is empty), the dynamic
options evaluation still attempts to map over the non-existent table
data, resulting in an empty array instead of the expected options.

**Root Cause**
The issue stems from the `getComputedValue` function always using the
table mapping binding prefix:
```typescript
{{${tableName}.processedTableData.map((currentRow, currentIndex) => (
  // dynamic options here
))}}
```
This creates an unnecessary dependency on table data even when the
dynamic options don't reference `currentRow` or `currentIndex`, causing
evaluation to fail when the table is empty.

### Problematic Evaluation
When the table is empty, expressions like this in table widget computed
properties:
```typescript
{{[
  { label: "Released", value: "Released" },
  { label: "Not Released", value: "Not Released" }
]}}
```
Would evaluate to an empty array `[]` because it's wrapped in a `.map()`
over empty table data.

**Solution**
Updated the binding logic to account for scenarios where table does not
have data and return the evaluated string directly in an IIFE

1. Updated the binding prefix and suffix
```typescript
static getBindingPrefix = (tableName: string) => {
  return `{{(() => { const tableData = ${tableName}.processedTableData || []; return tableData.length > 0 ? tableData.map((currentRow, currentIndex) => (`;
};

static getBindingSuffix = (stringToEvaluate: string) => {
  return `)) : ${stringToEvaluate} })()}}`;
};
```

2. Refactored `getComputedValue` and `getInputComputedValue` to
implement the new bindings
3. Created a migration and migration test for the DSL change

This ensures that:
- Dynamic options not dependent on table context evaluate correctly even
with empty tables
- The component maintains consistent behaviour across all table states

The solution prevents unnecessary table data dependencies while
preserving the ability to use table-specific values when required.


Fixes #23470  

## Automation

/ok-to-test tags="@tag.Table, @tag.Binding, @tag.Select, @tag.Sanity,
@tag.Widget"

### 🔍 Cypress test results
<!-- This is an auto-generated comment: Cypress test results  -->
> [!TIP]
> 🟢 🟢 🟢 All cypress tests have passed! 🎉 🎉 🎉
> Workflow run:
<https://github.com/appsmithorg/appsmith/actions/runs/13514895959>
> Commit: 0d2e78a0a7be63d4f70fc3499829621bd1761b3d
> <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=13514895959&attempt=1"
target="_blank">Cypress dashboard</a>.
> Tags: `@tag.Table, @tag.Binding, @tag.Select, @tag.Sanity,
@tag.Widget`
> Spec:
> <hr>Tue, 25 Feb 2025 07:52:52 UTC
<!-- end of auto-generated comment: Cypress test results  -->


## Communication
Should the DevRel and Marketing teams inform users about this change?
- [ ] Yes
- [x] No


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **New Features**
- Enhanced test coverage for adding new rows in the `TableV2` widget,
ensuring proper UI behavior when no data exists.
- **Bug Fixes**
- Improved validation of UI elements based on the "Allow adding a row"
property.
- **Refactor**
- Streamlined logic for handling computed values in the
`ComputeTablePropertyControlV2`, improving readability and
functionality.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

app/client/cypress/e2e/Regression/ClientSide/Widgets/TableV2/AddNewRow1_spec.js

@@ -1,5 +1,7 @@
 import {
   agHelper,
+  entityExplorer,
+  locators,
   propPane,
   table,
 } from "../../../../../support/Objects/ObjectsCore";
@@ -185,5 +187,56 @@ describe(
       propPane.TogglePropertyState("Allow adding a row", "Off");
       cy.get(".t--add-new-row").should("not.exist");
     });
+
+    it("1.8. should show the selectOptions data of a new row select cell when no data in the table", () => {
+      entityExplorer.DragDropWidgetNVerify("tablewidgetv2", 600, 750);
+      EditorNavigation.SelectEntityByName("Table2", EntityType.Widget);
+
+      // add base data
+      propPane.ToggleJSMode("Table data", "On");
+      propPane.UpdatePropertyFieldValue(
+        "Table data",
+        `{{[
+        {
+          role: "",
+        }
+        ]}}`,
+      );
+
+      // remove all table data
+      propPane.UpdatePropertyFieldValue("Table data", `[]`);
+
+      // allow adding a row
+      propPane.TogglePropertyState("Allow adding a row", "On");
+
+      // Edit role column to select type
+      table.ChangeColumnType("role", "Select", "v2");
+      table.EditColumn("role", "v2");
+      propPane.TogglePropertyState("Editable", "On");
+
+      // Add data to select options
+      agHelper.UpdateCodeInput(
+        locators._controlOption,
+        `
+      {{
+        [
+          {"label": "Software Engineer",
+          "value": 1,},
+          {"label": "Product Manager",
+          "value": 2,},
+          {"label": "UX Designer",
+          "value": 3,}
+        ]  
+      }}
+    `,
+      );
+
+      table.AddNewRow();
+      agHelper.GetNClick(commonlocators.singleSelectWidgetButtonControl);
+      agHelper
+        .GetElement(commonlocators.singleSelectWidgetMenuItem)
+        .contains("Software Engineer")
+        .click();
+    });
   },
 );

app/client/packages/dsl/src/migrate/index.ts

@@ -91,9 +91,10 @@ import { migrateTableServerSideFiltering } from "./migrations/086-migrate-table-
 import { migrateChartwidgetCustomEchartConfig } from "./migrations/087-migrate-chart-widget-customechartdata";
 import { migrateCustomWidgetDynamicHeight } from "./migrations/088-migrate-custom-widget-dynamic-height";
 import { migrateTableWidgetV2CurrentRowInValidationsBinding } from "./migrations/089-migrage-table-widget-v2-currentRow-binding";
+import { migrateTableComputeValueBinding } from "./migrations/090-migrate-table-compute-value-binding";
 import type { DSLWidget } from "./types";
 
-export const LATEST_DSL_VERSION = 91;
+export const LATEST_DSL_VERSION = 92;
 
 export const calculateDynamicHeight = () => {
   const DEFAULT_GRID_ROW_HEIGHT = 10;
@@ -617,6 +618,11 @@ const migrateVersionedDSL = async (currentDSL: DSLWidget, newPage = false) => {
   }
 
   if (currentDSL.version === 90) {
+    currentDSL = migrateTableComputeValueBinding(currentDSL);
+    currentDSL.version = 91;
+  }
+
+  if (currentDSL.version === 91) {
     /**
      * This is just a version bump without any migration
      * History: With this PR: https://github.com/appsmithorg/appsmith/pull/38391

app/client/packages/dsl/src/migrate/migrations/090-migrate-table-compute-value-binding.ts

@@ -0,0 +1,43 @@
+import type { DSLWidget } from "../types";
+import { isDynamicValue } from "../utils";
+
+/**
+ * This migration updates the table compute value bindings to use the new robust fallback mechanism
+ * Old format: {{table.processedTableData.map((currentRow, currentIndex) => ( value ))}}
+ * New format: {{(() => { const tableData = table.processedTableData || []; return tableData.length > 0 ? tableData.map((currentRow, currentIndex) => (value)) : value })()}}
+ */
+export const migrateTableComputeValueBinding = (currentDSL: DSLWidget) => {
+  if (currentDSL.type === "TABLE_WIDGET_V2") {
+    // Migrate primary columns compute values
+    if (currentDSL.primaryColumns) {
+      Object.keys(currentDSL.primaryColumns).forEach((columnKey) => {
+        const column = currentDSL.primaryColumns[columnKey];
+
+        if (column.computedValue && isDynamicValue(column.computedValue)) {
+          const oldBindingPrefix = `{{${currentDSL.widgetName}.processedTableData.map((currentRow, currentIndex) => (`;
+          const oldBindingSuffix = `))}}`;
+
+          if (column.computedValue.includes(oldBindingPrefix)) {
+            // Extract the value expression from between the old binding
+            const valueExpression = column.computedValue.substring(
+              oldBindingPrefix.length,
+              column.computedValue.length - oldBindingSuffix.length,
+            );
+
+            // Create new binding with fallback mechanism
+            column.computedValue = `{{(() => { const tableData = ${currentDSL.widgetName}.processedTableData || []; return tableData.length > 0 ? tableData.map((currentRow, currentIndex) => (${valueExpression})) : ${valueExpression} })()}}`;
+          }
+        }
+      });
+    }
+  }
+
+  // Recursively migrate children
+  if (currentDSL.children && currentDSL.children.length > 0) {
+    currentDSL.children = currentDSL.children.map((child: DSLWidget) =>
+      migrateTableComputeValueBinding(child),
+    );
+  }
+
+  return currentDSL;
+};

app/client/packages/dsl/src/migrate/tests/DSLMigration.test.ts

@@ -90,6 +90,7 @@ import * as m86 from "../migrations/086-migrate-table-server-side-filtering";
 import * as m87 from "../migrations/087-migrate-chart-widget-customechartdata";
 import * as m88 from "../migrations/088-migrate-custom-widget-dynamic-height";
 import * as m89 from "../migrations/089-migrage-table-widget-v2-currentRow-binding";
+import * as m90 from "../migrations/090-migrate-table-compute-value-binding";
 
 interface Migration {
   functionLookup: {
@@ -931,9 +932,18 @@ const migrations: Migration[] = [
     version: 89,
   },
   {
-    functionLookup: [],
+    functionLookup: [
+      {
+        moduleObj: m90,
+        functionName: "migrateTableComputeValueBinding",
+      },
+    ],
     version: 90,
   },
+  {
+    functionLookup: [],
+    version: 91,
+  },
 ];
 
 const mockFnObj: Record<number, any> = {};

app/client/packages/dsl/src/migrate/tests/TableWidgetV2/DSLs/TableComputeBindingDSLs.ts

@@ -0,0 +1,28 @@
+export const tableComputeBindingInputDsl = {
+  widgetName: "Table1",
+  type: "TABLE_WIDGET_V2",
+  primaryColumns: {
+    column1: {
+      computedValue:
+        "{{Table1.processedTableData.map((currentRow, currentIndex) => (currentRow.value))}}",
+    },
+    column2: {
+      computedValue: "static value",
+    },
+  },
+  version: 1,
+  children: [],
+};
+
+export const tableComputeBindingOutputDsl = {
+  ...tableComputeBindingInputDsl,
+  primaryColumns: {
+    column1: {
+      computedValue:
+        "{{(() => { const tableData = Table1.processedTableData || []; return tableData.length > 0 ? tableData.map((currentRow, currentIndex) => (currentRow.value)) : currentRow.value })()}}",
+    },
+    column2: {
+      computedValue: "static value",
+    },
+  },
+};

app/client/packages/dsl/src/migrate/tests/TableWidgetV2/TableWidget.test.ts

@@ -48,6 +48,11 @@ import {
   inputDsl as updateHeaderOptionsInputDsl,
   outputDsl as updateHeaderOptionsOutputDsl,
 } from "./DSLs/UpdateHeaderOptionsDSLs";
+import { migrateTableComputeValueBinding } from "../../migrations/090-migrate-table-compute-value-binding";
+import {
+  tableComputeBindingInputDsl,
+  tableComputeBindingOutputDsl,
+} from "./DSLs/TableComputeBindingDSLs";
 
 describe("Table Widget Property Pane Upgrade", () => {
   it("To test primaryColumns are created for a simple table", () => {
@@ -136,3 +141,11 @@ describe("migrateTableWidgetV2CurrentRowInValidationsBinding", () => {
     ).toEqual(currentRownInValidationsBindingOutput);
   });
 });
+
+describe("migrateTableComputeValueBinding", () => {
+  it("should migrate table compute value bindings to use new fallback mechanism", () => {
+    expect(
+      migrateTableComputeValueBinding(tableComputeBindingInputDsl),
+    ).toEqual(tableComputeBindingOutputDsl);
+  });
+});

app/client/src/components/propertyControls/TableComputeValue.test.tsx

@@ -0,0 +1,61 @@
+import ComputeTablePropertyControlV2 from "./TableComputeValue";
+
+describe("ComputeTablePropertyControlV2.getInputComputedValue", () => {
+  const tableName = "Table1";
+  const inputVariations = [
+    "currentRow.price",
+    `
+    [
+      {
+        "value": "male",
+        "label": "male"
+      },
+      {
+        "value": "female",
+        "label": "female"
+      }
+    ]
+    `,
+    `["123", "-456", "0.123", "-0.456"]`,
+    `["true", "false"]`,
+    `["null", "undefined"]`,
+    `{
+      "name": "John Doe",
+      "age": 30,
+      "isActive": true,
+      "address": {
+        "street": "123 Main St",
+        "city": "Boston"
+      },
+      "hobbies": ["reading", "gaming"]
+    }`,
+    "() => { return true; }",
+    "(x) => x * 2",
+    "currentRow.price * 2",
+    "currentRow.isValid && true",
+    "!currentRow.isDeleted",
+  ];
+
+  it("1. should return the correct computed value", () => {
+    inputVariations.forEach((input) => {
+      const computedValue =
+        ComputeTablePropertyControlV2.getTableComputeBinding(tableName, input);
+
+      expect(
+        ComputeTablePropertyControlV2.getInputComputedValue(computedValue),
+      ).toBe(`{{${input}}}`);
+    });
+  });
+
+  it("2. should handle addition values", () => {
+    const input = "currentRow.quantity + 5";
+    const computedValue = ComputeTablePropertyControlV2.getTableComputeBinding(
+      tableName,
+      input,
+    );
+
+    expect(
+      ComputeTablePropertyControlV2.getInputComputedValue(computedValue),
+    ).toBe(`{{currentRow.quantity}}{{5}}`);
+  });
+});

app/client/src/components/propertyControls/TableComputeValue.tsx

@@ -99,11 +99,12 @@ function InputText(props: InputTextProp) {
 }
 
 class ComputeTablePropertyControlV2 extends BaseControl<ComputeTablePropertyControlPropsV2> {
-  static getBindingPrefix(tableName: string) {
+  static getTableComputeBinding = (
-    return `{{${tableName}.processedTableData.map((currentRow, currentIndex) => ( `;
+    tableName: string,
-  }
+    stringToEvaluate: string,
-
+  ) => {
-  static bindingSuffix = `))}}`;
+    return `{{(() => { const tableData = ${tableName}.processedTableData || []; return tableData.length > 0 ? tableData.map((currentRow, currentIndex) => (${stringToEvaluate})) : ${stringToEvaluate} })()}}`;
+  };
 
   render() {
     const {
@@ -114,13 +115,9 @@ class ComputeTablePropertyControlV2 extends BaseControl<ComputeTablePropertyCont
       propertyValue,
       theme,
     } = this.props;
-    const tableName = this.props.widgetProperties.widgetName;
     const value =
       propertyValue && isDynamicValue(propertyValue)
-        ? ComputeTablePropertyControlV2.getInputComputedValue(
+        ? ComputeTablePropertyControlV2.getInputComputedValue(propertyValue)
-            propertyValue,
-            tableName,
-          )
         : propertyValue
           ? propertyValue
           : defaultValue;
@@ -157,24 +154,37 @@ class ComputeTablePropertyControlV2 extends BaseControl<ComputeTablePropertyCont
     );
   }
 
-  static getInputComputedValue = (propertyValue: string, tableName: string) => {
+  static getInputComputedValue = (propertyValue: string) => {
-    const bindingPrefix =
+    const MAP_FUNCTION_SIGNATURE = "map((currentRow, currentIndex) => (";
-      ComputeTablePropertyControlV2.getBindingPrefix(tableName);
 
-    if (propertyValue.includes(bindingPrefix)) {
+    const isComputedValue = propertyValue.includes(MAP_FUNCTION_SIGNATURE);
-      const value = `${propertyValue.substring(
-        bindingPrefix.length,
-        propertyValue.length -
-          ComputeTablePropertyControlV2.bindingSuffix.length,
-      )}`;
 
-      return JSToString(value);
+    if (!isComputedValue) return propertyValue;
-    } else {
+
-      return propertyValue;
+    // Extract the computation logic from the full binding string
-    }
+    // Input example: "{{(() => { const tableData = Table1.processedTableData || []; return tableData.length > 0 ? tableData.map((currentRow, currentIndex) => (currentRow.price * 2)) : currentRow.price * 2 })()}}"
+    const mapSignatureIndex = propertyValue.indexOf(MAP_FUNCTION_SIGNATURE);
+
+    // Find the actual computation expression between the map parentheses
+    const computationStart = mapSignatureIndex + MAP_FUNCTION_SIGNATURE.length;
+    const computationEnd = propertyValue.indexOf("))", computationStart);
+
+    // Extract the computation expression between the map parentheses
+    // Note: At this point, we're just extracting the raw expression like "currentRow.price * 2"
+    // The actual removal of "currentRow." prefix happens later in JSToString()
+    const computationExpression = propertyValue.substring(
+      computationStart,
+      computationEnd,
+    );
+
+    return JSToString(computationExpression);
   };
 
   getComputedValue = (value: string, tableName: string) => {
+    // Return raw value if:
+    // 1. The value is not a dynamic binding (not wrapped in {{...}})
+    // 2. AND this control is not configured to handle array values via additionalControlData
+    // This allows single values to be returned without table binding computation
     if (
       !isDynamicValue(value) &&
       !this.props.additionalControlData?.isArrayValue
@@ -188,9 +198,10 @@ class ComputeTablePropertyControlV2 extends BaseControl<ComputeTablePropertyCont
       return stringToEvaluate;
     }
 
-    return `${ComputeTablePropertyControlV2.getBindingPrefix(
+    return ComputeTablePropertyControlV2.getTableComputeBinding(
       tableName,
-    )}${stringToEvaluate}${ComputeTablePropertyControlV2.bindingSuffix}`;
+      stringToEvaluate,
+    );
   };
 
   onTextChange = (event: React.ChangeEvent<HTMLTextAreaElement> | string) => {