Pelajaran 4: Menduplikasi beberapa posting blog sekaligus

Kita dapat memperluas pelajaran tutorial sebelumnya, untuk menduplikasi beberapa posting dengan satu permintaan GraphQL.

Query GraphQL untuk menduplikasi beberapa posting sekaligus

Agar query GraphQL ini berfungsi, Konfigurasi Skema yang diterapkan pada endpoint harus mengaktifkan Nested Mutations

Query GraphQL ini menduplikasi posting yang diambil melalui variabel $limit dan $offset yang diberikan:

query InitializeDynamicVariables
  @configureWarningsOnExportingDuplicateVariable(enabled: false)
{
  postInputs: _echo(value: [])
    @export(as: "postInputs")
    @remove
}
 
query GetPostsAndExportData($limit: Int! = 5, $offset: Int! = 0)
  @depends(on: "InitializeDynamicVariables")
{
  postsToDuplicate: posts(
    pagination: {
      limit : $limit
      offset: $offset
    }
    sort: {
      by: ID,
      order: ASC
    }
  ) {
    # Fields not to be duplicated
    id
    slug
    date
    status
 
    # Fields to be duplicated
    author {
      id
    }
    categories {
      id
    }
    rawContent
    excerpt
    featuredImage {
      id
    }
    tags {
      id
    }
    title
 
    # Already create (and export) the inputs for the mutation
    postInputs: _echo(value: {
      status: draft,
      authorBy: {
        id: $__author
      },
      categoriesBy: {
        ids: $__categories
      },
      contentAs: {
        html: $__rawContent
      },
      excerpt: $__excerpt
      featuredImageBy: {
        id: $__featuredImage
      },
      tagsBy: {
        ids: $__tags
      },
      title: $__title
    })
      @export(as: "postInputs", type: LIST)
      @remove
  }
}
 
mutation DuplicatePosts
  @depends(on: "GetPostsAndExportData")
{
  createPosts(inputs: $postInputs) {
    status
    errors {
      __typename
      ...on ErrorPayload {
        message
      }
    }
    post {
      # Fields not to be duplicated
      id
      slug
      date
      status
 
      # Fields to be duplicated
      author {
        id
      }
      categories {
        id
      }
      rawContent
      excerpt
      featuredImage {
        id
      }
      tags {
        id
      }
      title
    }
  }
}

Langkah demi langkah: membuat query GraphQL

Berikut adalah analisis terperinci tentang cara kerja query tersebut.

Memperluas pelajaran tutorial "Menduplikasi posting blog"

Pelajaran sebelumnya menggunakan strategi berikut (pada query GraphQL dari pendekatan kedua):

Ekspor ID sumber daya dari field (termasuk field koneksi):

query GetPostAndExportData {
  post {
    author @export(as: "authorID") {
      id
    }
    categories @export(as: "categoryIDs") {
      id
    }
    rawContent @export(as: "rawContent")
    rawExcerpt @export(as: "excerpt")
    featuredImage @export(as: "featuredImageID") {
      id 
    }
    tags @export(as: "tagIDs") {
      id
    }
    rawTitle @export(as: "title")    
  }
}

Buat objek input untuk createPost(input:) dari variabel-variabel dinamis tersebut:

mutation DuplicatePost
  @depends(on: "GetPostAndExportData")
{
  createPost(input: {
    status: draft,
    authorBy: {
      id: $authorID
    },
    categoriesBy: {
      ids: $categoryIDs
    },
    contentAs: {
      html: $rawContent
    },
    excerpt: $excerpt
    featuredImageBy: {
      id: $featuredImageID
    },
    tagsBy: {
      ids: $tagIDs
    },
    title: $title
  }) {
    # ...
  }
}

Berkat ekstensi Field to Input, kita dapat membuat objek input sudah pada operasi pertama, dan mengekspor semua data posting yang diperlukan di bawah satu variabel dinamis:

query GetPostAndExportData {
  post {
    author {
      id
    }
    categories {
      id
    }
    rawContent
    excerpt
    featuredImage {
      id
    }
    tags {
      id
    }
    title
 
    postInputs: _echo(value: {
      status: draft,
      authorBy: {
        id: $__author
      },
      categoriesBy: {
        ids: $__categories
      },
      contentAs: {
        html: $__rawContent
      },
      excerpt: $__excerpt
      featuredImageBy: {
        id: $__featuredImage
      },
      tagsBy: {
        ids: $__tags
      },
      title: $__title
    })
      @export(as: "postInputs")
  }
}

Kemudian, pada mutation berikutnya, createPost(input:) langsung menerima variabel dinamis $postInputs:

mutation DuplicatePost
  @depends(on: "GetPostAndExportData")
{
  createPost(input: $postInputs) {
    # ...
  }
}

Mengambil beberapa posting

Kita harus mengonversi query untuk mengambil beberapa posting yang akan diduplikasi:

Query posting melalui posts(pagination: { limit : $limit, offset: $offset}) { ... }
Ekspor postInputs sebagai daftar (yaitu array yang berisi semua input untuk posting yang di-query)

query GetPostsAndExportData($limit: Int! = 5, $offset: Int! = 0)
  @depends(on: "InitializeDynamicVariables")
{
  postsToDuplicate: posts(
    pagination: {
      limit : $limit
      offset: $offset
    }
    sort: {
      by: ID,
      order: ASC
    }
  ) {
    # ...
 
    postInputs: _echo(value: {
      # ...
    })
      @export(
        as: "postInputs",
        type: LIST
      )
  }
}

Membuat beberapa posting dalam satu query GraphQL

Variabel dinamis $postInputs kini berisi array dengan semua data input untuk masing-masing posting yang akan diduplikasi:

[
  {
    "status": "draft",
    "authorBy": {
      "id": "2"
    },
    "categoryIDs": [
      1
    ],
    "contentAs": {
      "html": "<!-- wp:paragraph -->\n<p>Welcome to WordPress. This is your first post. Edit or delete it, then start writing!</p>\n<!-- /wp:paragraph -->"
    },
    "excerpt": "Welcome to WordPress. This is your first post. Edit or delete it, then start writing!",
    "featuredImageBy": {
      "id": null
    },
    "tagsBy": {
      "ids": []
    },
    "title": "Hello world!"
  },
  {
    "status": "draft",
    "authorBy": {
      "id": "3"
    },
    "categoryIDs": [
      3
    ],
    "contentAs": {
      "html": "<!-- wp:paragraph -->\n<p>This is a paragraph block. Professionally productize highly efficient results with world-class core competencies. Objectively matrix leveraged architectures vis-a-vis error-free applications. Completely maximize customized portals via fully researched metrics. Enthusiastically generate premier action items through web-enabled e-markets. Efficiently parallel task holistic intellectual capital and client-centric markets.<br><br></p>\n<!-- /wp:paragraph -->\n\n<!-- wp:heading -->\n<h2>Image Block (Standard)</h2>\n<!-- /wp:heading -->\n\n<!-- wp:image {\"id\":1755} -->\n<figure class=\"wp-block-image\"><img src=\"https://d.pr/i/8pTmgY+\" alt=\"\" class=\"wp-image-1755\"/></figure>\n<!-- /wp:image -->"
    },
    "excerpt": "This is a paragraph block. Professionally productize highly efficient results with world-class core competencies. Objectively matrix leveraged architectures vis-a-vis error-free applications. Completely maximize customized portals via fully researched metrics. Enthusiastically generate premier action items through web-enabled e-markets. Efficiently parallel task holistic intellectual capital and client-centric markets. Image Block (Standard)",
    "featuredImageBy": {
      "id": 361
    },
    "tagsBy": {
      "ids": [
        11,
        10
      ]
    },
    "title": "Released v0.6, check it out"
  }
]

Terakhir, kita memanggil bulk mutation createPosts untuk membuat semua posting dengan meneruskan data untuk input yang diekspor:

mutation DuplicatePosts
  @depends(on: "GetPostsAndExportData")
{
  createPosts(inputs: $postInputs) {
    status
    errors {
      __typename
      ...on ErrorPayload {
        message
      }
    }
    post {
      # Fields not to be duplicated
      id
      slug
      date
      status
 
      # Fields to be duplicated
      author {
        id
      }
      categories {
        id
      }
      rawContent
      excerpt
      featuredImage {
        id
      }
      tags {
        id
      }
      title
    }
  }
}

Terakhir, kita memanggil bulk mutation createPosts untuk membuat semua posting dengan meneruskan semua input:

mutation DuplicatePosts
  @depends(on: "GetPostsAndExportData")
{
  createPosts(inputs: $postInputs) {
    status
    errors {
      __typename
      ...on ErrorPayload {
        message
      }
    }
    post {
      # Fields not to be duplicated
      id
      slug
      date
      status
 
      # Fields to be duplicated
      author {
        id
      }
      categories {
        id
      }
      rawContent
      excerpt
      featuredImage {
        id
      }
      tags {
        id
      }
      title
    }
  }
}

Menghapus data yang tidak diperlukan

Langkah terakhir adalah menghapus semua field yang bersifat tambahan (sehingga kita tidak perlu mencetak outputnya dalam respons) melalui @remove.

Query GraphQL yang terkonsolidasi adalah:

query InitializeDynamicVariables
  @configureWarningsOnExportingDuplicateVariable(enabled: false)
{
  postInputs: _echo(value: [])
    @export(as: "postInputs")
    @remove
}
 
query GetPostsAndExportData($limit: Int! = 5, $offset: Int! = 0)
  @depends(on: "InitializeDynamicVariables")
{
  postsToDuplicate: posts(
    pagination: {
      limit : $limit
      offset: $offset
    }
    sort: {
      by: ID,
      order: ASC
    }
  ) {
    # Fields not to be duplicated
    id
    slug
    date
    status
 
    # Fields to be duplicated
    author {
      id
    }
    categories {
      id
    }
    rawContent
    excerpt
    featuredImage {
      id
    }
    tags {
      id
    }
    title
 
    # Already create (and export) the inputs for the mutation
    postInputs: _echo(value: {
      status: draft,
      authorBy: {
        id: $__author
      },
      categoriesBy: {
        ids: $__categories
      },
      contentAs: {
        html: $__rawContent
      },
      excerpt: $__excerpt
      featuredImageBy: {
        id: $__featuredImage
      },
      tagsBy: {
        ids: $__tags
      },
      title: $__title
    })
      @export(as: "postInputs", type: LIST)
      @remove
  }
}
 
mutation DuplicatePosts
  @depends(on: "GetPostsAndExportData")
{
  createPosts(inputs: $postInputs) {
    status
    errors {
      __typename
      ...on ErrorPayload {
        message
      }
    }
    post {
      # Fields not to be duplicated
      id
      slug
      date
      status
 
      # Fields to be duplicated
      author {
        id
      }
      categories {
        id
      }
      rawContent
      excerpt
      featuredImage {
        id
      }
      tags {
        id
      }
      title
    }
  }
}