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gatsby-tinacms-remark

A Gatsby/Tina plugin for editing Markdown files stored in git.

What is Tina?

Tina is a lightweight but powerful toolkit for creating a site editing ui with javascript components. Tina surfaces superpowers for dev’s to create, expand on and customize a simple yet intuitive ui for editing content.

Tina is optimized for nextgen JAMstack tools. It is based in javascript and is extensible enough to be configured with many different frameworks. Right now we have explored using Tina with Gatsby, Create-React-App & Next.js, with plans to dive into Vue.

Visit the website to learn more!

Installation

npm install --save gatsby-plugin-tinacms gatsby-tinacms-git gatsby-tinacms-remark

or

yarn add gatsby-plugin-tinacms gatsby-tinacms-git gatsby-tinacms-remark

Setup

Include gatsby-plugin-tinacms, gatsby-tinacms-git, and gatsby-tinacms-remark in your config:

gatsby-config.js

module.exports = {
  // ...
  plugins: [
    // ...
    {
      resolve: 'gatsby-plugin-tinacms',
      options: {
        plugins: ['gatsby-tinacms-git', 'gatsby-tinacms-remark'],
      },
    },
  ],
}

Register a form

There are three ways to register remark forms with the CMS, depending on the component:

• useRemarkForm- A React Hook — useful for any function component. You can use this with components that source data from a static query using Gatsby's useStaticQuery hook.
• RemarkForm — A Render Props component — useful for any class component. Can be used with components sourcing data from a static query using Gatsby's StaticQuery render props component.
• remarkForm — A Higher-Order Component — useful for page components (function or class), that source data from a page query.

All of these options can only take data (transformed by gatsby-transformer-remark) from a markdownRemark query. If you need more information on using Markdown in Gatsby, refer to this documentation.

1. The Hook: useRemarkForm

This hook connects the markdownRemark data with Tina to be made editable. It is useful in situations where you need to edit on non-page components, or just prefer working with hooks or static queries. You can also use this hook with functional page components.

Usage:

useRemarkForm(remark, options): [values, form]

Arguments:

• remark: The data returned from a Gatsby markdownRemark query.
• options: A configuration object that can include form options or form actions (such as the DeleteAction)— optional.

Return:

• [values, form]
  • values: The current values to render in the template. This has the same shape as the markdownRemark data.
  • form: A reference to the Form. Most of the time you won't need to directly work with the Form.

/*
 ** example component --> src/components/Title.js
 */

// 1. import useRemarkForm and usePlugin
import { useRemarkForm } from 'gatsby-tinacms-remark'
import { usePlugin } from 'tinacms'
import { useStaticQuery } from 'gatsby'

const Title = data => {
  // 2. Add required GraphQL fragment
  const data = useStaticQuery(graphql`
    query TitleQuery {
      markdownRemark(fields: { slug: { eq: "song-of-myself" } }) {
        ...TinaRemark
        frontmatter {
          title
        }
      }
    }
  `)

  // 3. Call the hook and pass in the data
  const [markdownRemark, form] = useRemarkForm(data.markdownRemark)

  // 4. Register the form plugin
  usePlugin(form)

  return <h1>{markdownRemark.frontmatter.title}</h1>
}

export default Title

To use this hook, you'll first need to import it from gatsby-tinacms-remark. Then you'll need to add the GraphQL fragment ...TinaRemark to your query. The fragment adds these parameters: id, fileRelativePath, rawFrontmatter, and rawMarkdownBody. Finally you'll call the hook and pass in the markdownRemark data.

The form will populate with default text fields. To customize it, you can pass in a config options object as the second parameter. Jump ahead to learn more on customizing the form.

2. The Render Props Component: RemarkForm

RemarkForm is a thin wrapper around useRemarkForm and usePlugin. Since React Hooks are only available within function components you will need to use RemarkForm instead of calling those hooks directly working with a class component.

Props:

• remark: the data returned from a Gatsby markdownRemark query.
• render(renderProps): JSX.Element: A function that returns JSX elements
  • renderProps.markdownRemark: The current values to be displayed. This has the same shape as the markdownRemark data that was passed in.
  • renderProps.form: A reference to the Form.

You can use this with both page and non-page components in Gatsby. Below is an example of using RemarkForm in a non-page component using StaticQuery.

/*
 ** example component --> src/components/Title.js
 */
import { StaticQuery, graphql } from 'gatsby'

// 1. import RemarkFrom
import { RemarkForm } from 'gatsby-tinacms-remark'

class Title extends React.Component {
  render() {
    return (
      <StaticQuery
        // 2. add ...TinaRemark fragment to query
        query={graphql`
          query TitleQuery {
            markdownRemark(fields: { slug: { eq: "song-of-myself" } }) {
              ...TinaRemark
              frontmatter {
                title
              }
            }
          }
        `}
        render={data => (
          /*
           ** 3. Return RemarkForm, pass in the props
           **    and then return the JSX this component
           **    should render
           */
          <RemarkForm
            remark={data.markdownRemark}
            render={({ markdownRemark }) => {
              return <h1>{markdownRemark.frontmatter.title}</h1>
            }}
          />
        )}
      />
    )
  }
}

export default Title

Here is another example using RemarkForm with a page component:

/*
 ** src/templates/blog-post.js
 */

// 1. import RemarkForm
import { RemarkForm } from '@tinacms/gatsby-tinacms-remark'

class BlogPostTemplate extends React.Component {
  render() {
    /*
     ** 2. Return RemarkForm, pass in markdownRemark
     **    as props and return the jsx this component
     **    should render
     */
    return (
      <RemarkForm
        remark={this.props.data.markdownRemark}
        render={({ markdownRemark }) => {
          return <h1>{markdownRemark.frontmatter.title}</h1>
        }}
      />
    )
  }
}

export default BlogPostTemplate

// 3. Add ...TinaRemark fragment to query
export const pageQuery = graphql`
  query {
    markdownRemark(fields: { slug: { eq: $slug } }) {
      ...TinaRemark
      frontmatter {
        title
      }
    }
  }
`

Learn how to customize the fields displayed in the form below.

3. The Higher-Order Component: remarkForm

The remarkForm higher-order component (HOC) let's us register forms with Tina on Gatsby page components.

There are 3 steps to making a Markdown file editable with remarkForm:

1. Import the remarkForm HOC
2. Wrap your template with remarkForm
3. Add ...TinaRemark to the GraphQL query

Required fields used to be queried individually: id, fileRelativePath, rawFrontmatter, & rawMarkdownBody. The same fields are now being queried via ...TinaRemark

Example: src/templates/blog-post.js

// 1. Import the `remarkForm` HOC
import { remarkForm } from 'gatsby-tinacms-remark'

function BlogPostTemplate(props) {
  return <h1>{props.data.markdownRemark.frontmatter.title}</h1>
}

// 2. Wrap your template with `remarkForm`
export default remarkForm(BlogPostTemplate)

// 3. Add the required fields to the GraphQL query
export const pageQuery = graphql`
  query BlogPostBySlug($slug: String!) {
    markdownRemark(fields: { slug: { eq: $slug } }) {
      id
      html
      frontmatter {
        title
        date
        description
      }
      ...TinaRemark
    }
  }
`

You should now see text inputs for each of your front matter fields and for the Markdown body. Try changing the title and see what happens!

Queries aliasing 'markdownRemark'

NOTE: If your query uses an alias for 'markdownRemark', then you will have to use the 'queryName' option to specify the alias name.

Example: src/templates/blog-post.js

/// ...

// Use 'queryName' to specify where markdownRemark is found.
export default remarkForm(BlogPostTemplate, { queryName: 'myContent' })

// Aliasing markdownRemark as 'myContent'
export const pageQuery = graphql`
  query BlogPostBySlug($slug: String!) {
    myContent: markdownRemark(fields: { slug: { eq: $slug } }) {
      // ...
    }
  }
`

Customizing the Form

remarkForm HOC Example

The remarkForm HOC and useRemarkForm hook both accept an optional config object as the second argument.

/*
 ** src/templates/blog-post.js
 */

import { remarkForm } from 'gatsby-tinacms-remark'

function BlogPostTemplate(props) {
  return (
    <>
      <h1>{props.markdownRemark.frontmatter.title}</h1>
      <p>{props.markdownRemark.frontmatter.description}</p>
    </>
  )
}

// 1. Define the form config
const BlogPostForm = {
  label: 'Blog Post',
  fields: [
    {
      label: 'Title',
      name: 'frontmatter.title',
      description: 'Enter the title of the post here',
      component: 'text',
    },
    {
      label: 'Description',
      name: 'frontmatter.description',
      description: 'Enter the post description',
      component: 'textarea',
    },
  ],
}

// 2. Pass it as a the second argument to `remarkForm`
export default remarkForm(BlogPostTemplate, BlogPostForm)

useRemarkForm Hook Example

import { useRemarkForm } from 'gatsby-tinacms-remark'

function BlogPostTemplate(props) {
  // 1. Define the form
  const BlogPostForm = {
    label: 'Blog Post',
    fields: [
      {
        label: 'Title',
        name: 'frontmatter.title',
        description: 'Enter the title of the post here',
        component: 'text',
      },
      {
        label: 'Description',
        name: 'frontmatter.description',
        description: 'Enter the post description',
        component: 'textarea',
      },
    ],
  }

  // 2. Pass the form as the second argument
  const [markdownRemark, form] = useRemarkForm(
    props.markdownRemark,
    BlogPostForm
  )

  // 3. Register the form as a plugin
  usePlugin(form)

  return (
    <>
      <h1>{markdownRemark.frontmatter.title}</h1>
      <p>{markdownRemark.frontmatter.description}</p>
    </>
  )
}

export default BlogPostTemplate

RemarkForm Render Props Example

For the RemarkFormcomponent, you pass in the config options individually as props to the render function.

import { RemarkForm } from 'gatsby-tinacms-remark'

class BlogPostTemplate extends React.Component {
  render() {
    return (
      <RemarkForm
        remark={this.props.data.markdownRemark}
        render={({ markdownRemark }) => {
          return (
            <>
              <h1>{markdownRemark.frontmatter.title}</h1>
              <p>{markdownRemark.frontmatter.description}</p>
            </>
          )
        }}
        label="Blog Post"
        fields={[
          {
            label: 'Title',
            name: 'frontmatter.title',
            description: 'Enter the title of the post here',
            component: 'text',
          },
          {
            label: 'Description',
            name: 'frontmatter.description',
            description: 'Enter the post description',
            component: 'textarea',
          },
        ]}
      />
    )
  }
}

export default BlogPostTemplate

Content Creators

The RemarkCreatorPlugin: Constructs a content-creator plugin for Markdown files.

interface RemarkCreatorPlugin{
     label: string
     fields: Field[]
     filename(form: any): Promise<string>
     frontmatter?(form: any): Promise<any>
     body?(form: any): Promise<string>
}

Example

import { RemarkCreatorPlugin } from 'gatsby-tinacms-remark'

const CreatePostPlugin = new RemarkCreatorPlugin({
  label: 'New Blog Post',
  filename: form => {
    return form.filename
  },
  fields: [
    {
      name: 'filename',
      component: 'text',
      label: 'Filename',
      placeholder: 'content/blog/hello-world/index.md',
      description:
        'The full path to the new Markdown file, relative to the repository root.',
    },
  ],
})