https://www.shopify.com/partners/blog/shopify-graphql-learning-kit

shopify-graphql-learning-kit

# Insomnia Configuration
## Run the test query
{
  shop {
    id
    name
  }
}

# Query Structure Examples
## QueryRoot objects
{
  shop {
    id
    name
    description
    email
  }
}

## Connections and edges
{
  products(first:3) {
    edges {
      node {
        id
        handle
        variants(first:3) {
          edges {
            node {
              id
              displayName
            }
          }
        }
      }
    }
  }
}

## Filtering connections using the query parameter
{
  orders(first:10, query:"fulfillment_status:fulfilled") {
    edges {
      node {
        id
        name
        displayFulfillmentStatus          
      }
    }
  }
}

## Single Object by ID
{
  product(id: "gid://shopify/Product/1730990145609") {
    id
    handle
    variants (first:5) {
      edges {
        node {
          title
        }
      }
    }
  }
}

# Mutation Structure Examples
## Basics and Inputs
mutation {
  customerCreate (
    input: {
      firstName: "GraphQL",
      lastName: "Customer",
      email: "gqlcustomer@gmail.com"
    }
  ) 
  {
    customer {
      id
      firstName
      lastName
      email
    }
    userErrors {
      field
      message
    }
  }
}

## Inputs v2
mutation {
  draftOrderCreate(
    input: {
      customerId: "gid://shopify/Customer/870935789641",
      lineItems: [
        {
          title: "My custom line item!",
          quantity: 1,
          originalUnitPrice: 10
        },
        {
          title: "My SECOND custom line item!",
          quantity: 3,
          originalUnitPrice: 3.99
        }
      ]
    }
  ) 
  {
    userErrors {
      field
      message
    }
    draftOrder {
      id
      customer {
        id
        email
      }
    }
  }
}

# GraphQL Variables
## Variables
### query
query getDraftOrderByID($id: ID!) {
  draftOrder (id: $id) {
    totalPrice
    lineItems (first: 5) {
      edges {
        node {
          originalUnitPrice
          quantity
        }
      }
    }
  }
}

### variables
{
  "id": "gid://shopify/DraftOrder/135477690441"
}

# Pagination
## What is PageInfo?
### query
query getFirstOrders($numOrders: Int, $numLineItems: Int)
{
  orders(first:$numOrders) {
    pageInfo {
      hasNextPage
    }
    edges {
      node {
        id
        lineItems (first:$numLineItems) {
          edges {
            node {
              id
            }
          }
        }
      }
    }
  }
}

### variables
{
  "numOrders": 10,
  "numLineItems": 5
}

## The Cursor
### query
query getFirstOrdersCursor($numOrders: Int, $numLineItems: Int)
{
  orders(first:$numOrders) {
    pageInfo {
      hasNextPage
    }
    edges {
      cursor
      node {
        id
        lineItems (first:$numLineItems) {
          edges {
            node {
              id
            }
          }
        }
      }
    }
  }
}

### variables
{
  "numOrders": 10,
  "numLineItems": 5
}

## The Cursor v2
### query
query getFirstOrdersWithCursor($numOrders: Int, $numLineItems: Int, $cursor: String)
{
  orders(first:$numOrders, after:$cursor) {
    pageInfo {
      hasNextPage
    }
    edges {
      cursor
      node {
        id
        lineItems (first:$numLineItems) {
          edges {
            node {
              id
            }
          }
        }
      }
    }
  }
}

### variables
{
  "numOrders": 10,
  "numLineItems": 5,
  "cursor": "eyJsYXN0X2lkIjo2OTA1NzE5MzU4MTcsImxhc3RfdmFsdWUiOiIyMDE3LTExLTIxIDE0OjE3OjAzIn0="
}

# Advanced
## Fragments - Handle Multiple Cases
### query
query getLineItemLocationId($id: ID!) {
  node(id: $id) {
    ... on LineItem {
      id
      variant {
        inventoryItem {
          inventoryLevels(first: 1) {
            edges {
              node {
                location {
                  id
                  name
                }
              }
            }
          }
        }
      }
    }
  }
}

### variables
{
  "id": "gid://shopify/LineItem/1588425490505"
}

## Multiple Queries - One Request
mutation {
  VipGold: customerUpdate(
    input: {
      id: "gid://shopify/Customer/870935789641", 
      tags: ["Gold"]
    }
  ) 
  {
    customer {
      tags
    }
  }
  VipPlatinum: customerUpdate(
    input: {
      id: "gid://shopify/Customer/870602047561", 
      tags: ["Platinum"]
    }
  ) 
  {
    customer {
      tags
    }
  }
  VipDiamond: customerUpdate(
    input: {
      id: "gid://shopify/Customer/870602014793", 
      tags: ["Diamond"]
    }
  ) 
  {
    customer {
      tags
    }
  }
}