Generate a full (query+mutation) GraphQL schema from your SQLAlchemy Declarative Model Base.
Project description
sqlalchemy-graphql-schemagen
Generate a full (query/mutation) GraphQL Schema from your defined classes in a declarative_meta() Model.
Example
#!/usr/bin/env python
from flask import Flask
from flask_graphql import GraphQLView
from sqlalchemy import create_engine
from medgraphqlapi import generate_custom_column_docstrings
from sqlalchemy_graphql_schemagen import SQLAlchemyGraphQLSchemaGenerator
from medgraphqlapi.database_schema import Base as sa_base_declarative
################################
# SQLAlchemy Stuff
################################
sa_connection_string = "mssql+pyodbc://XXXXXXXXXXXX"
# Create the Engine
sa_engine = create_engine(sa_connection_string)
# Generate more useful columns' docstrings (ex.: type length, collation, ...)
generate_custom_column_docstrings(sa_base_declarative)
################################
# Build a GraphQL Schema from the SQLAlchemy Schema, using sqlalchemy_graphql_schemagen!
################################
graphql_schema = SQLAlchemyGraphQLSchemaGenerator(
"ApiName",
sa_base_declarative,
sa_connection_string=sa_connection_string,
).get_graphene_schema()
################################
# Instantiate Flask App
################################
app = Flask(__name__)
# Plug GraphQLView
app.add_url_rule("/graphql",
view_func=GraphQLView.as_view("graphql",
schema=graphql_schema,
graphiql=True))
# That's it!
if __name__ == "__main__":
app.run(host="0.0.0.0")
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