pardeep-singh / blogging-graphql

Blogging APP implemented in Clojure using GraphQL.

Sample Blogging APP using GraphQL and Compojure.

This project provides the sample blogging app to try GraphQL with Lacinia and Compojure in Clojure.

Prerequisites

To run this project, Java 8 and Leiningen needs to be installed.

Running

1. Build the jar

lein uberjar

2. Start the GraphQL server

java -jar target/blogging-graphql-0.1.0-standalone.jar

3. Open GraphiQL IDE using http://localhost:7000/graphiql in your browser.

Using GraphiQL IDE

1. Queries - Fetch Resources

{
  blogs: getBlogs {
    id
    author {
      id
    }
    comments {
      body
    }
  }
  authors: getAllAuthors {
    id
    email
    name
  }
}

2. Mutations - Create or Update Resources

mutation {
  createAuthor(email: "[e-mail]", name: "Random Author") {
    id
    name
    email
  }
}

3. Fragments - Reusable Units

fragment author_fields on author {
  id
  email
  name
}
fragment comment_fields on comment {
  id
  body
  author {
    ...author_fields
  }
}
fragment blog_fields on blog {
  id
  body
  author {
    ...author_fields
  }
  comments {
    ...comment_fields
  }
}
{
  getBlogs {
    ...blog_fields
  }
}

4. Variables - Pass Dynamic Values to Queries.
   Pass below as query

query queries($blogID: String!, $first: Int!, $skip: Int!) {
  blog: getBlog(id: $blogID) {
    id
    comments(first: $first) {
      id
    }
  }
  authors: getAllAuthors {
    id
  }
  blogs: getBlogs(first: $first) {
    id
    comments {
      id
    }
  }
  comments: getComments(blogID: $blogID, first: $first, skip: $skip) {
    id
  }
}

and this as a query variables(change the blogID value accordingly)

{
  "blogID": "40bcb0b5-fe8b-4486-af4a-5f2f395ca75c",
  "first": 5,
  "skip": 0
}

5. Schema Introspection - Inspect Schema

{
  __schema{
  types{
    name
    description
  }
  queryType{
    name
    description
    fields{
      name
      description
      }
    }
    mutationType{
      name
      description
      fields{
        name
        description
      }
    }
  }
}