How to upload an image in graphql in flask?

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by darion , in category: Javascript , 3 months ago

How to upload an image in graphql in flask?

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1 answer

by cortez.connelly , 3 months ago

@darion 

To upload an image in GraphQL in Flask, you can follow these steps:

  1. Install the required packages: Make sure you have Flask and Flask-GraphQL installed. If not, you can install them using pip:
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pip install Flask
pip install Flask-GraphQL


  1. Set up a Flask app with GraphQL: Create a Flask app and set up a GraphQL schema using something like Graphene or Flask-GraphQL. Here's an example of setting up a Flask app with Graphene:
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from flask import Flask
from graphene import Schema, ObjectType, Field, String

app = Flask(__name__)

class Query(ObjectType):
    hello = String(name=String(default_value="stranger"))

    def resolve_hello(self, info, name):
        return f"Hello, {name}!"

schema = Schema(query=Query)

@app.route("/graphql", methods=["POST"])
def graphql():
    data = request.json
    query = data["query"]
    result = schema.execute(query)
    return result.to_dict()

if __name__ == "__main__":
    app.run()


  1. Upload image using GraphQL mutation: You can define a GraphQL mutation that accepts an image as input and saves it to a file or database. Here's an example of how you can define a mutation to upload an image in Graphene:
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from graphene import Mutation, InputObjectType, Field, String

class FileUploadInput(InputObjectType):
    file = String()

class UploadFile(Mutation):
    class Arguments:
        file = FileUploadInput(required=True)

    ok = Boolean()

    def mutate(root, info, file):
        # save the file to disk or database
        return UploadFile(ok=True)

class Mutation(ObjectType):
    upload_file = UploadFile.Field()

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


  1. Test the file upload mutation: You can test the file upload mutation by sending a GraphQL query with the file input. Here's an example of how you can test the mutation using a GraphQL client like Postman:
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{
  "query": "mutation { uploadFile(file: { file: 'path/to/image.jpg' }) { ok } }"
}


By following these steps, you should be able to upload an image in GraphQL in Flask.