Migrating to preview options

Last modified: April 2nd, 2024

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How you configure previews in CloudCannon has changed. We recommend updating, but the previous configuration will continue to work. There’s now a consolidated key called preview that encompasses our previous keys:

  • text_key
  • text
  • subtext_key
  • subtext
  • icon_key
  • icon
  • image_key
  • image
  • image_size
  • preview_image
  • description

As our configuration has grown, many of these keys were used inconsistently across different locations. We now offer a single option called preview that contains each of these options in a cascading process.

You can now define more than one option value for each preview option. Each option value is processed in order until a data value is found.

This is used in a number of places so far:

  1. Hugo Shortcodes (Snippets)
  2. Snippet Picker
  3. Structures inside Array inputs
  4. Structure Picker
  5. Select-style inputs
  6. Object inputs
  7. Non-structure items inside Array inputs

Examples#

Here are a number of examples to show the difference before and after migrating.

Collection items#

Changing how collection items look in the collection file list:

cloudcannon.config.yml (legacy)
copied
collections_config:
  posts:
    text_key: heading
    subtext_key: author
    icon: event_available
    image_key: thumbnail
    image_size: contain
cloudcannon.config.yaml
copied
collections_config:
  posts:
    icon: event_available
    preview:
      text_key:
        - key: heading
      subtext_key:
        - key: author
      icon: event_available
      image:
        - key: thumbnail
cloudcannon.config.json
copied
{
  "collections_config": {
    "posts": {
      "icon": "event_available",
      "preview": {
        "text_key": [
          {
            "key": "heading"
          }
        ],
        "subtext_key": [
          {
            "key": "author"
          }
        ],
        "icon": "event_available",
        "image": [
          {
            "key": "thumbnail"
          }
        ]
      }
    }
  }
}
cloudcannon.config.cjs
copied
module.exports = {
  collections_config: {
    posts: {
      icon: "event_available",
      preview: {
        text_key: [
          {
            key: "heading"
          }
        ],
        subtext_key: [
          {
            key: "author"
          }
        ],
        icon: "event_available",
        image: [
          {
            key: "thumbnail"
          }
        ]
      }
    }
  }
};

Changing how a collection item with a schema appears in the collection file list:

cloudcannon.config.yml (legacy)
copied
collections_config:
  posts:
    schemas:
      default:
        path: schemas/post.md
      news:
        path: schemas/news-post.md
        text_key: heading
        icon: newspaper
        image_key: cover_image
        image_size: cover
cloudcannon.config.yaml
copied
collections_config:
  posts:
    schemas:
      default:
        path: schemas/post.md
      news:
        path: schemas/news-post.md
        preview:
          text:
            - key: heading
          icon: newspaper
          gallery:
            image:
              - key: cover_image
            fit: cover
cloudcannon.config.json
copied
{
  "collections_config": {
    "posts": {
      "schemas": {
        "default": {
          "path": "schemas/post.md"
        },
        "news": {
          "path": "schemas/news-post.md",
          "preview": {
            "text": [
              {
                "key": "heading"
              }
            ],
            "icon": "newspaper",
            "gallery": {
              "image": [
                {
                  "key": "cover_image"
                }
              ],
              "fit": "cover"
            }
          }
        }
      }
    }
  }
}
cloudcannon.config.cjs
copied
module.exports = {
  collections_config: {
    posts: {
      schemas: {
        default: {
          path: "schemas/post.md"
        },
        news: {
          path: "schemas/news-post.md",
          preview: {
            text: [
              {
                key: "heading"
              }
            ],
            icon: "newspaper",
            gallery: {
              image: [
                {
                  key: "cover_image"
                }
              ],
              fit: "cover"
            }
          }
        }
      }
    }
  }
};

Object and Array inputs#

Changing how an object input appears in the Data Editor before opening:

cloudcannon.config.yml (legacy)
copied
seo:
  title: About us
  description: A longer description of the page that is all about us.
  image: /uploads/seo-cover.png
_inputs:
  seo:
    text_key: title
    subtext_key: description
    icon: search
    image_key: image
cloudcannon.config.yaml
copied
seo:
  title: About us
  description: A longer description of the page that is all about us.
  image: /uploads/seo-cover.png
_inputs:
  seo:
    preview:
      text:
        - key: title
      subtext:
        - key: description
      icon: search
      image:
        - key: image
cloudcannon.config.json
copied
{
  "seo": {
    "title": "About us",
    "description": "A longer description of the page that is all about us.",
    "image": "/uploads/seo-cover.png"
  },
  "_inputs": {
    "seo": {
      "preview": {
        "text": [
          {
            "key": "title"
          }
        ],
        "subtext": [
          {
            "key": "description"
          }
        ],
        "icon": "search",
        "image": [
          {
            "key": "image"
          }
        ]
      }
    }
  }
}
cloudcannon.config.cjs
copied
module.exports = {
  seo: {
    title: "About us",
    description: "A longer description of the page that is all about us.",
    image: "/uploads/seo-cover.png"
  },
  _inputs: {
    seo: {
      preview: {
        text: [
          {
            key: "title"
          }
        ],
        subtext: [
          {
            key: "description"
          }
        ],
        icon: "search",
        image: [
          {
            key: "image"
          }
        ]
      }
    }
  }
};

Changing how a non-structure item within an array input appears in the Data Editor before opening:

cloudcannon.config.yml (legacy)
copied
quotes:
  - message: Great product!
    author: Jane
    image: /uploads/jane.png
  - message: Highly recommended.
    author: John
    image: /uploads/john.png
_inputs:
  quotes:
    text_key: message
    subtext_key: author
    icon: format_quote
    image_key: image
cloudcannon.config.yaml
copied
quotes:
  - message: Great product!
    author: Jane
    image: /uploads/jane.png
  - message: Highly recommended.
    author: John
    image: /uploads/john.png
_inputs:
  quotes:
    preview:
      text:
        - key: message
      subtext:
        - key: author
      icon: format_quote
      image:
        - key: image
cloudcannon.config.json
copied
{
  "quotes": [
    {
      "message": "Great product!",
      "author": "Jane",
      "image": "/uploads/jane.png"
    },
    {
      "message": "Highly recommended.",
      "author": "John",
      "image": "/uploads/john.png"
    }
  ],
  "_inputs": {
    "quotes": {
      "preview": {
        "text": [
          {
            "key": "message"
          }
        ],
        "subtext": [
          {
            "key": "author"
          }
        ],
        "icon": "format_quote",
        "image": [
          {
            "key": "image"
          }
        ]
      }
    }
  }
}
cloudcannon.config.cjs
copied
module.exports = {
  quotes: [
    {
      message: "Great product!",
      author: "Jane",
      image: "/uploads/jane.png"
    },
    {
      message: "Highly recommended.",
      author: "John",
      image: "/uploads/john.png"
    }
  ],
  _inputs: {
    quotes: {
      preview: {
        text: [
          {
            key: "message"
          }
        ],
        subtext: [
          {
            key: "author"
          }
        ],
        icon: "format_quote",
        image: [
          {
            key: "image"
          }
        ]
      }
    }
  }
};

Structures#

Changing how a structure item appears when choosing a new one to add in the Data Editor:

cloudcannon.config.yml (legacy)
copied
_structures:
  gallery:
    style: modal
    values:
      - label: Image
        description: Full width image
        preview_image: https://example.com/image-screenshot.png
        image: /path/to/image.png
        icon: image
        text_key: caption
        subtext_key: image
        image_key: image
        image_size: cover
        tags:
          - Media
          - Asset
        value:
          image: /uploads/placeholder.png
          caption:
      - label: External link
        icon: link
        tags:
          - Media
        value:
          url:
          title:
cloudcannon.config.yaml
copied
_structures:
  gallery:
    style: modal
    values:
      - label: Image
        icon: image
        tags:
          - Media
          - Asset
        value:
          image: /uploads/placeholder.png
          caption: 
        preview:
          text:
            - key: caption
          icon: image
          subtext:
            - key: image
            - Full width image
          gallery:
            image:
              - key: image
              - /path/to/image.png
            fit: cover
        picker_preview:
          gallery:
            image: https://example.com/image-screenshot.png
      - label: External link
        icon: link
        tags:
          - Media
        value:
          url: 
          title:
cloudcannon.config.json
copied
{
  "_structures": {
    "gallery": {
      "style": "modal",
      "values": [
        {
          "label": "Image",
          "icon": "image",
          "tags": [
            "Media",
            "Asset"
          ],
          "value": {
            "image": "/uploads/placeholder.png",
            "caption": null
          },
          "preview": {
            "text": [
              {
                "key": "caption"
              }
            ],
            "icon": "image",
            "subtext": [
              {
                "key": "image"
              },
              "Full width image"
            ],
            "gallery": {
              "image": [
                {
                  "key": "image"
                },
                "/path/to/image.png"
              ],
              "fit": "cover"
            }
          },
          "picker_preview": {
            "gallery": {
              "image": "https://example.com/image-screenshot.png"
            }
          }
        },
        {
          "label": "External link",
          "icon": "link",
          "tags": [
            "Media"
          ],
          "value": {
            "url": null,
            "title": null
          }
        }
      ]
    }
  }
}
cloudcannon.config.cjs
copied
module.exports = {
  _structures: {
    gallery: {
      style: "modal",
      values: [
        {
          label: "Image",
          icon: "image",
          tags: [
            "Media",
            "Asset"
          ],
          value: {
            image: "/uploads/placeholder.png",
            caption: null
          },
          preview: {
            text: [
              {
                key: "caption"
              }
            ],
            icon: "image",
            subtext: [
              {
                key: "image"
              },
              "Full width image"
            ],
            gallery: {
              image: [
                {
                  key: "image"
                },
                "/path/to/image.png"
              ],
              fit: "cover"
            }
          },
          picker_preview: {
            gallery: {
              image: "https://example.com/image-screenshot.png"
            }
          }
        },
        {
          label: "External link",
          icon: "link",
          tags: [
            "Media"
          ],
          value: {
            url: null,
            title: null
          }
        }
      ]
    }
  }
};

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