GitHub - Cdaprod/cda.graphql

To integrate a GraphQL interface for your hydrate project, which populates MinIO and Weaviate, we will follow the same structured approach. The goal is to enable interaction with MinIO and Weaviate through GraphQL queries and mutations. Here’s how we can adapt the outline to fit your specific use case:

1. Define the Schema

1.1. Types

Define types that represent the entities in your project, such as datasets and objects stored in MinIO and Weaviate.

type Dataset {
  id: ID!
  name: String!
  description: String
  createdAt: String!
  updatedAt: String!
}

type MinIOObject {
  key: String!
  bucket: String!
  url: String!
}

type WeaviateObject {
  id: ID!
  class: String!
  properties: JSON
}

1.2. Queries

Define queries to fetch data from MinIO and Weaviate.

type Query {
  listMinIOObjects(bucket: String!): [MinIOObject]
  getMinIOObject(bucket: String!, key: String!): MinIOObject
  listWeaviateObjects(class: String!): [WeaviateObject]
  getWeaviateObject(id: ID!, class: String!): WeaviateObject
}

1.3. Mutations

Define mutations to modify data in MinIO and Weaviate.

type Mutation {
  uploadMinIOObject(bucket: String!, key: String!, file: Upload!): MinIOObject
  deleteMinIOObject(bucket: String!, key: String!): Boolean
  createWeaviateObject(class: String!, properties: JSON!): WeaviateObject
  updateWeaviateObject(id: ID!, class: String!, properties: JSON!): WeaviateObject
  deleteWeaviateObject(id: ID!, class: String!): Boolean
}

2. Set Up the GraphQL Server

2.1. Install Dependencies

Install necessary dependencies using pip, including graphene, flask-graphql, minio, and weaviate-client.

pip install graphene flask-graphql minio weaviate-client

2.2. Create the Server

Set up a Flask application with the GraphQL endpoint.

from flask import Flask
from flask_graphql import GraphQLView
from schema import schema

app = Flask(__name__)
app.add_url_rule(
    '/graphql',
    view_func=GraphQLView.as_view('graphql', schema=schema, graphiql=True)
)

if __name__ == '__main__':
    app.run(debug=True)

3. Implement Resolvers

3.1. Define the Schema with Resolvers

Create a schema with Graphene that includes the types, queries, and mutations.

import graphene
from minio import Minio
from weaviate import Client

# Initialize MinIO client
minio_client = Minio(
    'play.min.io',
    access_key='YOUR_ACCESS_KEY',
    secret_key='YOUR_SECRET_KEY',
    secure=True
)

# Initialize Weaviate client
weaviate_client = Client('http://localhost:8080')

class MinIOObject(graphene.ObjectType):
    key = graphene.String()
    bucket = graphene.String()
    url = graphene.String()

class WeaviateObject(graphene.ObjectType):
    id = graphene.ID()
    class_name = graphene.String()
    properties = graphene.JSONString()

class Query(graphene.ObjectType):
    list_minio_objects = graphene.List(MinIOObject, bucket=graphene.String(required=True))
    get_minio_object = graphene.Field(MinIOObject, bucket=graphene.String(required=True), key=graphene.String(required=True))
    list_weaviate_objects = graphene.List(WeaviateObject, class_name=graphene.String(required=True))
    get_weaviate_object = graphene.Field(WeaviateObject, id=graphene.ID(required=True), class_name=graphene.String(required=True))

    def resolve_list_minio_objects(self, info, bucket):
        objects = minio_client.list_objects(bucket)
        return [MinIOObject(key=obj.object_name, bucket=bucket, url=minio_client.presigned_get_object(bucket, obj.object_name)) for obj in objects]

    def resolve_get_minio_object(self, info, bucket, key):
        url = minio_client.presigned_get_object(bucket, key)
        return MinIOObject(key=key, bucket=bucket, url=url)

    def resolve_list_weaviate_objects(self, info, class_name):
        result = weaviate_client.query.get(class_name).do()
        objects = result['data']['Get'][class_name]
        return [WeaviateObject(id=obj['id'], class_name=class_name, properties=obj['properties']) for obj in objects]

    def resolve_get_weaviate_object(self, info, id, class_name):
        result = weaviate_client.query.get(class_name).with_id(id).do()
        obj = result['data']['Get'][class_name][0]
        return WeaviateObject(id=obj['id'], class_name=class_name, properties=obj['properties'])

class UploadMinIOObject(graphene.Mutation):
    class Arguments:
        bucket = graphene.String(required=True)
        key = graphene.String(required=True)
        file = graphene.String(required=True)  # Assuming file is base64 encoded string for simplicity

    object = graphene.Field(lambda: MinIOObject)

    def mutate(self, info, bucket, key, file):
        minio_client.put_object(bucket, key, file, len(file))
        url = minio_client.presigned_get_object(bucket, key)
        return MinIOObject(key=key, bucket=bucket, url=url)

class CreateWeaviateObject(graphene.Mutation):
    class Arguments:
        class_name = graphene.String(required=True)
        properties = graphene.JSONString(required=True)

    object = graphene.Field(lambda: WeaviateObject)

    def mutate(self, info, class_name, properties):
        obj = weaviate_client.data_object.create(properties, class_name)
        return WeaviateObject(id=obj['id'], class_name=class_name, properties=properties)

class Mutation(graphene.ObjectType):
    upload_minio_object = UploadMinIOObject.Field()
    create_weaviate_object = CreateWeaviateObject.Field()

schema = graphene.Schema(query=Query, mutation=Mutation)

4. Test the GraphQL Interface

4.1. Start the Server

Run your Flask server and navigate to /graphql to access the GraphiQL interface.

4.2. Test Queries and Mutations

Test the defined queries and mutations to ensure they work as expected.

5. Documentation

5.1. Schema Documentation

Provide a detailed description of each type, query, and mutation in your schema.

5.2. Example Queries and Mutations

Include example queries and mutations in your documentation.

# Example Query to List MinIO Objects
query {
  listMinIOObjects(bucket: "my-bucket") {
    key
    url
  }
}

# Example Mutation to Upload MinIO Object
mutation {
  uploadMinIOObject(bucket: "my-bucket", key: "example.txt", file: "SGVsbG8gd29ybGQ=") {
    key
    url
  }
}

File Structure

Organize your project files for better maintainability.

/graphql-hydrate/
├── app.py
├── schema.py
├── requirements.txt
└── README.md

This outline provides a comprehensive guide to setting up a GraphQL interface for your hydrate project. You can expand upon each step with more specific details and logic as needed for your particular use case.