Inventory Management System Backend (Nestjs + Graphql)

You can start your Inventory Management Backend project from here.

Authentication implemented with OAuth (but not saving in local database). If you want then develop it.

Technology Used

1. Nestjs (Nodejs Backend Framework)
2. Graphql (Code First Approach)
3. JWT based authentication
4. Mongodb (Nest's mongoose module is used)
5. OAuth (google)

How to run

1. Clone the project in your local pc
2. Go to the root directory and open terminal (or powershell)
3. Create a database with the name nest (mongodb database)
4. Run the command npm install
5. After installing all of the packages run npm run start:dev
6. Now you can play with the graphql but you need a valid jwt token that can be achieved from OAuth authentication (google)
7. To achieve a jwt token go to http://localhost:3000/auth/google. Signin with your gmail account and after successfully signedin you will redirected to a new url. Collect the jwt from this page.
8. Now open the browser and go to localhost:3000/graphql.
9. Enjoy your project with query or mutation in the graphql playground. Your first task should be creating some Customer and some Inventory.

See the graphql query and mutation documentation below for details.

Graphql Query/Mutation Documentation

1. Create Customer.

mutation{
  createCustomer(input: {
    name: "Mahmudul Hasan",
    mobile: "01751006948",
    address: "Gulshan, Dhaka"
  }){
    name
    id
    mobile
    address
  }
}

2. Get All Customers.

query{
  customer{
    id
    name
    mobile
    address
  }
}

3. Create New Inventory (Product).

mutation {
  createInventories(
    input: {
      name: "Rice - Basmoti",
      code: "12aa89",
      unit_price: 1700,
      description: "Good rice in reasonable price"
    }
  ) {
    id
    name
    code
    description
    unit_price
  }
}

4. Get all Inventories (Products).

query {
  inventory {
    id
    name
    unit_price
    description
  }
}

5. Create an Invoice.

mutation {
  createInvoice(
    input: {
      total_amount: 314
      number_of_product: 3
      customer: {
        id: "612c376654ca3382d124eaf4"
        name: "Alee Abdullah"
        mobile: "01925008348"
        address: "Niznanduali"
      }
      invoice_items: [
        {
          id: "612c2e9271f82a6bd2c9d83c"
          code: "543fcfvg"
          name: "Madani Panjabi"
          unit_price: 1300
          description: "Alhamdulillah! a nice product"
          qty: 2
        }
        {
          id: "612c2f1c39e3be6d0d52276d"
          name: "Sweet Chokolate"
          code: "ljgo343"
          unit_price: 544
          description: "Masha Allah"
          qty: 4
        }
      ]
    }
  ) {
    total_amount
    number_of_product
    customer {
      id
      name
    }
    invoice_items{
      name
      qty
      unit_price
    }
  }
}

6. Get all Invoices.

query{
  invoices{
    total_amount
    number_of_product
    customer{
      id
      name
      mobile
    }
    invoice_items{
      name
      code
    	qty
    }
  }
}