How i can create draft order using GraphQL API

[vinodk]

Hello
I am working on public app and i want to create draft order with change item price with the help of graphql API but not able to figure out how i will do. Please any one let me know complete process of creating draft order by mutation in graphql.  below is some example code.

mutation {
		draftOrderCreate(
			input: {
				email: "test@gmail.com"
                lineItems: {
                    appliedDiscount: {
                        amount: 20
                        description: "test des"
                        title : "Test two"
                        value: 10
                        valueType: FIXED_AMOUNT
                    }
                    customAttributes: {
                        key: "payment"
                        value: "partial"
                    }
                    quantity: 2
                    weight : {
                        unit: GRAMS
                        value: 10
                    }
                }
                localizationExtensions: {
                    key: SHIPPING_CREDENTIAL_BR
                    value: "test"
                }
                metafields: {
                    description: "test"
                    key: "orde_id"
                    namespace: "prt"
                    type: "test"
                    value: "drt"

                }
                paymentTerms: {
                    paymentSchedules: {
                        dueAt: "2022-12-17T15:50:00Z"
                        issuedAt: "2022-12-15T15:50:00Z"
                    }
                }
                privateMetafields: {
                    key: "Test"
                    namespace: "dftrt"
                    valueInput: {
                        value: "testd"
                        valueType: STRING
                    }
                }
              purchasingEntity: {
                    customerId: "gid://shopify/Customer/6453791457508"
                    purchasingCompany: {
                       companyContactId: "gid://shopify/companies/63373540"
                       companyId: "gid://shopify/companies/63373540"
                       companyLocationId: "gid://shopify/locations/63570148"
                    }
                  }
                shippingAddress: {
                    address1: "sdsd"
                    address2: "sadsd"
                    city: "karnal"
                    company: "desonomate"
                    country: "India"
                    countryCode: IN
                    firstName: "Vinod"
                    lastName: "Kumar"
                    phone: "+919865326598"
                    province: "Haryana"
                    provinceCode: "HR"
                    zip: "132157"
                  }               
                  shippingLine: {
                    price: 50
                    shippingRateHandle: "FEDS"
                    title: "fedex"
                  }


			}
		) {
			 userErrors {
                field
                message
            }
		}
	}

[ShopifyDevSup]

Hi @vinodk 👋

You can use the `DraftOrderLineItemInput.appliedDiscount` parameter to modify the line item price. In my example `draftOrderCreate` mutation below, a fixed amount discount was applied to a line item: 

mutation ($input: DraftOrderInput!) {
    draftOrderCreate(input: $input) {
        draftOrder {
            id
            lineItems (first:5) {
                nodes {
                    id 
                    originalUnitPrice
                    discountedUnitPrice
                    appliedDiscount {
                        amountV2 {
                            amount
                        }
                    }
                }
            }
        }
    }
}

With variables: 

{
    "input": {
        "lineItems": [{
            "appliedDiscount": {
                "amount": "5.00",
                "description": "test modify lineitem price",
                "title": "modify lineitem price",
                "value": 5.00,
                "valueType": "FIXED_AMOUNT"
            },
            "variantId": "gid://shopify/ProductVariant/39803484209270",
            "quantity": 1
        }
    ],
        "purchasingEntity":{
            "customerId": "gid://shopify/Customer/5790884724854"
        }
    }
}

The mutation successfully returned the below response where we can see the discount applied:

{
    "data": {
        "draftOrderCreate": {
            "draftOrder": {
                "id": "gid://shopify/DraftOrder/897414987894",
                "lineItems": {
                    "nodes": [{
                         "id": "gid://shopify/DraftOrderLineItem/57463112892534",
                         "originalUnitPrice": "97.87",
                         "discountedUnitPrice": "92.87",
                         "appliedDiscount": {
                             "amountV2": {
                                 "amount": "5.0"
                             }
                         }
                    }]
                }
            }
        }
    }
}

Hope that helps!