由于我的 GraphQL 查询中的错误，构建失败

Question

字段“category”不是MarkdownRemarkFrontmatterFilterInput类型定义的。什么意思，请指教。

我使用 Netlify CMS 作为 Gatsbyjs 前端的内容管理器。我正在使用这个入门模板https://github.com/netlify-templates/gatsby-starter-netlify-cms 他们显示标签的方式我想类似地显示类别所以我复制了它的标签相关文件并将标签替换为类别集合，还在 config.yml 文件中添加了类别集合。下面是那个代码。 构建错误 https://prnt.sc/sb6pwd 错误在 index.js 文件中。

category.js 这是我列出所有类别和该类别总博客数的模板文件

import React from 'react'
import { Helmet } from 'react-helmet'
import { Link, graphql } from 'gatsby'
import Layout from '../components/Layout'

class CategoryRoute extends React.Component {
  render() {
    const posts = this.props.data.allMarkdownRemark.edges
    const postLinks = posts.map((post) => (
      <li key={post.node.fields.slug}>
        <Link to={post.node.fields.slug}>
          <h2 className="is-size-2">{post.node.frontmatter.title}</h2>
        </Link>
      </li>
    ))
    const category = this.props.pageContext.category
    const title = this.props.data.site.siteMetadata.title
    const totalCount = this.props.data.allMarkdownRemark.totalCount
    const categoryHeader = `${totalCount} post${
      totalCount === 1 ? '' : 's'
    } tagged with “${category}”`

    return (
      <Layout>
        <section className="section">
          <Helmet title={`${category} | ${title}`} />
          <div className="container content">
            <div className="columns">
              <div
                className="column is-10 is-offset-1"
                style={{ marginBottom: '6rem' }}
              >
                <h3 className="title is-size-4 is-bold-light">{categoryHeader}</h3>
                <ul className="taglist">{postLinks}</ul>
                <p>
                  <Link to="/category/">Browse all category</Link>
                </p>
              </div>
            </div>
          </div>
        </section>
      </Layout>
    )
  }
}

export default CategoryRoute

export const categoryPageQuery = graphql`
  query CategoryPage($category: String) {
    site {
      siteMetadata {
        title
      }
    }
    allMarkdownRemark(
      limit: 1000
      sort: { fields: [frontmatter___date], order: DESC }
      filter: { frontmatter: { category: { in: [$category] } } }
    ) {
      totalCount
      edges {
        node {
          fields {
            slug
          }
          frontmatter {
            title

          }
        }
      }
    }
  }
`

index.js

import React from 'react'
import { kebabCase } from 'lodash'
import { Helmet } from 'react-helmet'
import { Link, graphql } from 'gatsby'
import Layout from '../../components/Layout'

const CategoryPage = ({
  data: {
    allMarkdownRemark: { group },
    site: {
      siteMetadata: { title },
    },
  },
}) => (
  <Layout>
    <section className="section">
      <Helmet title={`Category | ${title}`} />
      <div className="container content">
        <div className="columns">
          <div
            className="column is-10 is-offset-1"
            style={{ marginBottom: '6rem' }}
          >
            <h1 className="title is-size-2 is-bold-light">Categories</h1>
            <ul className="taglist">
              {group.map((category) => (
                <li key={category.fieldValue}>
                  <Link to={`/category/${kebabCase(category.fieldValue)}/`}>
                    {category.fieldValue} ({category.totalCount})
                  </Link>
                </li>
              ))}
            </ul>
          </div>
        </div>
      </div>
    </section>
  </Layout>
)

export default CategoryPage

export const categoryPageQuery = graphql`
  query CategoryQuery {
    site {
      siteMetadata {
        title
      }
    }
    allMarkdownRemark(limit: 1000) {
      group(field: frontmatter___category) {
        fieldValue
        totalCount
      }
    }
  }
`

Config.yml 分类集合声明：

- name: category
    label: Category
    identifier_field: slug
    folder: src/pages/blog/category
    create: true
    fields:
      -label: Template Key
       name: templateKey
       widget: hidden
       default: category
      - label: Category
        name: category
        widget: string
      - label: Category Image
        name: category_img
        widget: image
      - label: Slug
        name: slug
        widget: string
  - name: blog
    label: Blog
    folder: src/pages/blog
    create: true
    slug: "{{year}}-{{month}}-{{day}}-{{slug}}"
    fields:
      - label: Template Key
        name: templateKey
        widget: hidden
        default: blog-post
      - label: Title
        name: title
        widget: string
      - label: Path
        name: path
        widget: hidden
        default: blog-post
      - label: Publish Date
        name: date
        widget: datetime
      - label: Description
        name: description
        widget: text
      - label: Featured Post
        name: featuredpost
        widget: boolean
      - label: Featured Image
        name: featuredimage
        widget: image
      - label: Body
        name: body
        widget: markdown
      - label: Tags
        name: tags
        widget: list
      - label: Category
        name: category
        widget: select
        options:
          - label: Iraq
            value: iraq
          - label: Personal
            value: personal
          - label: Productivity
            value: productivity
          - label: Software Development
            value: software-development
          - label: Uncategorized
            value: uncategorized

Answer 1

您需要为此字段添加一些初始数据。如果您查看控制台，您可能会看到这样的内容：

• 您希望有选择地使用您的字段，但现在它没有在任何地方使用。因此盖茨比无法推断类型并将其添加到 GraphQL 架构。一个快速的解决方法是添加至少一个条目 字段（“虚拟内容”）