> ## Documentation Index > Fetch the complete documentation index at: https://api-docs.datagol.ai/llms.txt > Use this file to discover all available pages before exploring further. # Get Link Data > ## 1️⃣ Overview **Purpose:** Retrieves the linked records for a specific row via a LINK column. Given a source record's row ID, this returns all destination records that are linked to it through the specified link column. --- ## 2️⃣ Endpoint ``` GET /noCo/api/v2/workspaces/{workspaceId}/tables/{tableId}/{linkColumnId}/linkData?id={rowId} ``` --- ## 3️⃣ Path Parameters | Parameter | Type | Required | Description | | --- | --- | --- | --- | | workspaceId | UUID | ✅ Yes | Workspace identifier | | tableId | UUID | ✅ Yes | Source table identifier | | linkColumnId | UUID | ✅ Yes | ID of the LINK column to fetch linked data for | --- ## 4️⃣ Query Parameters | Parameter | Type | Required | Description | | --- | --- | --- | --- | | id | integer | ✅ Yes | The row ID of the source record whose linked records you want to retrieve | --- ## 5️⃣ Authentication Requires **Bearer JWT Token** ``` Authorization: Bearer ``` --- ## 6️⃣ Request Headers | Header | Required | | --- | --- | | Authorization | ✅ Yes | | Content-Type: application/json | ✅ Yes | --- ## 7️⃣ Example Request ```bash curl -X GET 'https://be.datagol.ai/noCo/api/v2/workspaces/{workspaceId}/tables/{tableId}/{linkColumnId}/linkData?id=1' \ -H "Authorization: Bearer " ``` --- ## 8️⃣ Behavior Summary ``` Returns all records linked to the specified source row via the given LINK column. Supports: • Fetching linked records for any LINK column type (HAS_MANY, ONE_TO_ONE, MANY_TO_MANY) • id query param — row ID of the source record in the current table • linkColumnId — identifies which link column's data to retrieve ``` ## OpenAPI ````yaml /openapi/openapi.yaml get /noCo/api/v2/workspaces/{workspaceId}/tables/{tableId}/{linkColumnId}/linkData openapi: 3.0.0 info: title: DataGOL APIs version: 1.0.0 description: '' servers: - url: https://be.datagol.ai - url: https://be.datagol.ai - url: https://kg.datagol.ai - url: https://ai.datagol.ai security: [] tags: - name: Links & Joins description: > ## 🔗 Links & Joins LINK and LOOKUP are special workbook column types that enable relational data modeling across tables. | Column Type | Purpose | |---|---| | `LINK` | Defines a relationship between two tables | | `LOOKUP` | Projects columns from an associated table via a link | Both are configured through `ColumnDTO.colOptions`. A table can have multiple link columns, and each link can have multiple lookup columns. --- ## 📐 UI Data Types - **LINK** — Special column used to represent inter-table relations - **LOOKUP** — Special column used to project associated table fields via a link --- ## 🔗 LINK Semantics A LINK column stores metadata for: - `tableId` — Current table - `associatedTableId` — Associated (linked) table - `relationType` — Type of relationship - `linkColumnId` — Link column identifier **Supported relation patterns:** | Pattern | Description | |---|---| | `ONE_TO_ONE` | Each record in the source maps to one record in the destination | | `ONE_TO_MANY` | One source record maps to many destination records | | `MANY_TO_MANY` | Many source records map to many destination records | --- ## 🔍 LOOKUP Semantics - A LOOKUP column is tightly coupled with a specific LINK column - References a link using `linkColumnId` - Represents a selected column from the associated table - Multiple lookup columns can be defined for the same link --- ## 🗂️ Metadata in `ColumnDTO.colOptions` Use `colOptions` to persist link/lookup metadata. | Field | Description | |---|---| | `columnId` | Current column ID | | `tableId` | Current table ID | | `associatedTableId` | Associated table ID | | `linkColumnId` | Link column ID — used by LOOKUP; references the LINK column's `columnId` | | `relationType` | Relation semantics for LINK | --- ## 🔄 Manual Linking Record Flow To create manual record-level links: 1. Fetch associated table schema/data 2. User selects associated record(s) to link 3. Send linking payload with: - `sourceRecordId` — PK of the current table row - `destinationRecordId` — PK of the associated table row - `linkColumnId` — LINK column identifier 4. Backend resolves link metadata from `linkColumnId` (relation type, associated table, direction/constraints) 5. Backend applies relation rules and stores the link relation --- ## 📋 Record Linking Contract | Field | Description | |---|---| | `sourceRecordId` | PK of the current table row | | `destinationRecordId` | PK of the associated table row | | `linkColumnId` | LINK column identifier | | `tableId` | Current table ID | > Backend derives all remaining relation metadata from the link configuration. --- ## ⚠️ Important Notes > - LINK and LOOKUP are **column-level constructs** first; record linking is a data-level operation built on top > - LOOKUP behavior depends on LINK existence and metadata integrity > - With multiple links to the same associated table, each LOOKUP must bind to the correct `linkColumnId` > - Always treat the associated row ID as the associated table PK for linking UI selection paths: /noCo/api/v2/workspaces/{workspaceId}/tables/{tableId}/{linkColumnId}/linkData: get: tags: - Links & Joins summary: Get Link Data description: >- ## 1️⃣ Overview **Purpose:** Retrieves the linked records for a specific row via a LINK column. Given a source record's row ID, this returns all destination records that are linked to it through the specified link column. --- ## 2️⃣ Endpoint ``` GET /noCo/api/v2/workspaces/{workspaceId}/tables/{tableId}/{linkColumnId}/linkData?id={rowId} ``` --- ## 3️⃣ Path Parameters | Parameter | Type | Required | Description | | --- | --- | --- | --- | | workspaceId | UUID | ✅ Yes | Workspace identifier | | tableId | UUID | ✅ Yes | Source table identifier | | linkColumnId | UUID | ✅ Yes | ID of the LINK column to fetch linked data for | --- ## 4️⃣ Query Parameters | Parameter | Type | Required | Description | | --- | --- | --- | --- | | id | integer | ✅ Yes | The row ID of the source record whose linked records you want to retrieve | --- ## 5️⃣ Authentication Requires **Bearer JWT Token** ``` Authorization: Bearer ``` --- ## 6️⃣ Request Headers | Header | Required | | --- | --- | | Authorization | ✅ Yes | | Content-Type: application/json | ✅ Yes | --- ## 7️⃣ Example Request ```bash curl -X GET 'https://be.datagol.ai/noCo/api/v2/workspaces/{workspaceId}/tables/{tableId}/{linkColumnId}/linkData?id=1' \ -H "Authorization: Bearer " ``` --- ## 8️⃣ Behavior Summary ``` Returns all records linked to the specified source row via the given LINK column. Supports: • Fetching linked records for any LINK column type (HAS_MANY, ONE_TO_ONE, MANY_TO_MANY) • id query param — row ID of the source record in the current table • linkColumnId — identifies which link column's data to retrieve ``` parameters: - name: workspaceId in: path required: true schema: type: string format: uuid description: Workspace identifier - name: tableId in: path required: true schema: type: string format: uuid description: Source table identifier - name: linkColumnId in: path required: true schema: type: string format: uuid description: ID of the LINK column to fetch linked data for - name: id in: query required: true schema: type: integer description: >- The row ID of the source record whose linked records you want to retrieve responses: '200': description: Linked records retrieved successfully content: application/json: schema: type: array items: type: object properties: id: type: integer description: Row ID of the linked record in the destination table cellValues: type: object description: >- Map of column names to their values for the linked record properties: column1: type: number description: User-defined column value column2: type: string description: User-defined column value column3: type: number description: User-defined column value column4: type: integer description: User-defined column value example: - id: 2 cellValues: course_id: 102 course_name: JAVA st_id: 3 employee_075d: 2 employee_753d: 4 security: - bearerAuth: [] components: securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: JWT description: | This API uses OAuth 2.0 with the authorization code grant flow. ````