issue作成

mutation createIssue($title: String!, $body: String, $labelIds: [ID!]) {
      createIssue(input:{title: $title, body: $body, repositoryId: "Your Repository Id", labelIds: $labelIds}) {
        issue {
          id
          number
        }
      }
    }

issueをproject(beta)に登録

mutation addProjectV2ItemById($issueId: ID!, $projectId: ID!) {
      addProjectV2ItemById(input: {contentId: $issueId, projectId: $projectId}) {
        item {
          id
        }
      }
    }

project(beta)に紐ついたissueのprojectカスタム項目を更新（複数）

mutation updateProjectV2ItemFieldValue($issueId: ID!, $column1: String!, $column2: Float!, $column1FieldId: ID!, $column2FieldId: ID!, $projectId: ID!) {
      updateColumn1: updateProjectV2ItemFieldValue(input:{itemId: $issueId, fieldId: $column1FieldId, projectId: $projectId, value: {iterationId: $column1Id}}) {
        clientMutationId
      },
      updateColumn2: updateProjectV2ItemFieldValue(input:{itemId: $issueId, fieldId: $column2FieldId, projectId: $projectId, value: {number: $column2}}){
        clientMutationId
      }
    }

Iteration項目のvalue idを見つかる

query($org: String!, $projectNum: Int!, $fieldName: String!) {
      organization(login: $org) {
        projectV2(number: $projectNum) {
          field(name: $fieldName) {
            ... on ProjectV2IterationField {
             id
              configuration {
                iterations {
                  id
                  title
                }
              }
            }
          }
        }
      }
    }

最後に

projectV2のField探す、repository id探すなどは以前の記事にすでに紹介ずみ