skills-app

GraphQL API built with Flask, MySQL, SQLAlchemy, Graphene and Python 3.7

This app works with 3 basic entities (user, profile, skill) that are exposed via a GraphQL API.

Prerequisites

• Python 3.7
• Pip 3
• Virtualenv
• Docker
• Docker Compose

Installation

After cloning the project create a virtual environment and activate it:

    $ virtualenv venv
    $ source venv/bin/activate

Install dependencies from requirements.txt:

    (venv) $ pip3 install -r requirements.txt

Run

This application is deployed in its own Docker image and the example DB is in a MySQL image. In order to run them both, there's a Docker Compose yml file ready to go:

    $ docker-compose build
    $ docker-compose run

To test the application, access http://localhost:5000/graphql

Examples

This application implements both data mutation and queries. For example, the following mutation creates a user:

    mutation {
      mutateUser(username: "mrbrown", name: "Quentin", lastName: "Tarantino") {
        user {
          username
          name
          lastName
        }
      }
    }

Then with another mutation a profile with skills can be created for the previous user:

   mutation {
      mutateProfile(description: "Javascript developer since forever", role: "JS Developer", userId: 1, skills: [{
          name: "JavaScript",
          score: 5
      }, {
          name: "TypeScript",
          score: 2
      }]) {
          profile {
              description
              role
              skills {
                  name
                  score
              }
          }
      }
  }

This is an example query filtering by username and score, projecting only the user's name, profile's role and all information about skills:

  {
      users(username: "mrbrown") {
          name
          profile {
              role
              skills(score: 2) {
                  name
                  score
              }
          }
      }
  }

References

• How to GraphQL
• Graphene docs
• GraphQL vs Rest API architecture