mirror of
https://github.com/datahub-project/datahub.git
synced 2025-10-31 10:49:00 +00:00
89 lines
3.8 KiB
Markdown
89 lines
3.8 KiB
Markdown
# How To Set Up GraphQL
|
|
|
|
## Preparing Local Datahub Deployment
|
|
|
|
The first thing you'll need to use the GraphQL API is a deployed instance of DataHub with some metadata ingested.
|
|
For more information, please refer to [Datahub Quickstart Guide](/docs/quickstart.md).
|
|
|
|
## Querying the GraphQL API
|
|
|
|
DataHub's GraphQL endpoint is served at the path `/api/graphql`, e.g. `https://my-company.datahub.com/api/graphql`.
|
|
There are a few options when it comes to querying the GraphQL endpoint.
|
|
|
|
For **Testing**:
|
|
|
|
- GraphQL Explorer (GraphiQL)
|
|
- CURL
|
|
- Postman
|
|
|
|
For **Production**:
|
|
|
|
- GraphQL [Client SDK](https://graphql.org/code/) for the language of your choice
|
|
- Basic HTTP client
|
|
|
|
> Notice: The DataHub GraphQL endpoint only supports POST requests at this time.
|
|
|
|
### GraphQL Explorer (GraphiQL)
|
|
|
|
DataHub provides a browser-based GraphQL Explorer Tool ([GraphiQL](https://github.com/graphql/graphiql)) for live interaction with the GraphQL API. This tool is available at the path `/api/graphiql` (e.g. `https://my-company.datahub.com/api/graphiql`)
|
|
This interface allows you to easily craft queries and mutations against real metadata stored in your live DataHub deployment.
|
|
|
|
To experiment with GraphiQL before deploying it in your live DataHub deployment, you can access a demo site provided by DataHub at https://demo.datahubproject.io/api/graphiql.
|
|
For instance, you can create a tag by posting the following query:
|
|
|
|
```json
|
|
mutation createTag {
|
|
createTag(input:
|
|
{
|
|
name: "Deprecated",
|
|
description: "Having this tag means this column or table is deprecated."
|
|
})
|
|
}
|
|
```
|
|
|
|
For a detailed usage guide, check out [How to use GraphiQL](https://www.gatsbyjs.com/docs/how-to/querying-data/running-queries-with-graphiql/).
|
|
|
|
### CURL
|
|
|
|
CURL is a command-line tool used for transferring data using various protocols including HTTP, HTTPS, and others.
|
|
To query the DataHub GraphQL API using CURL, you can send a `POST` request to the `/api/graphql` endpoint with the GraphQL query in the request body.
|
|
Here is an example CURL command to create a tag via GraphQL API:
|
|
|
|
```shell
|
|
curl --location --request POST 'http://localhost:8080/api/graphql' \
|
|
--header 'Authorization: Bearer <my-access-token>' \
|
|
--header 'Content-Type: application/json' \
|
|
--data-raw '{ "query": "mutation createTag { createTag(input: { name: \"Deprecated\", description: \"Having this tag means this column or table is deprecated.\" }) }", "variables":{}}'
|
|
```
|
|
|
|
### Postman
|
|
|
|
Postman is a popular API client that provides a graphical user interface for sending requests and viewing responses.
|
|
Within Postman, you can create a `POST` request and set the request URL to the `/api/graphql` endpoint.
|
|
In the request body, select the `GraphQL` option and enter your GraphQL query in the request body.
|
|
|
|
|
|
<p align="center">
|
|
<img width="70%" src="https://raw.githubusercontent.com/datahub-project/static-assets/main/imgs/apis/postman-graphql.png"/>
|
|
</p>
|
|
|
|
|
|
Please refer to [Querying with GraphQL](https://learning.postman.com/docs/sending-requests/graphql/graphql-overview/) in the Postman documentation for more information.
|
|
|
|
### Authentication + Authorization
|
|
|
|
In general, you'll need to provide an [Access Token](../../authentication/personal-access-tokens.md) when querying the GraphQL by
|
|
providing an `Authorization` header containing a `Bearer` token. The header should take the following format:
|
|
|
|
```bash
|
|
Authorization: Bearer <access-token>
|
|
```
|
|
|
|
Authorization for actions exposed by the GraphQL endpoint will be performed based on the actor making the request.
|
|
For Personal Access Tokens, the token will carry the user's privileges. Please refer to [Access Token Management](/docs/api/graphql/token-management.md) for more information.
|
|
|
|
## What's Next?
|
|
|
|
Now that you are ready with GraphQL, how about browsing through some use cases?
|
|
Please refer to [Getting Started With GraphQL](/docs/api/graphql/getting-started.md) for more information.
|