Add Collection Types doc

website/site/content/docs/collection-types.md

@@ -0,0 +1,127 @@
+---
+title: Collection Types
+position: 27
+---
+
+# Collection Types
+
+All editable content types are defined in the `collections` field of your `config.yml` file, and display in the left sidebar of the Content page of the editor UI.
+
+Collections come in two main types: `folder` and `file`.
+
+
+## Folder collections
+
+Folder collections represent one or more files with the same format, fields, and configuration options, all stored within the same folder in the repository. You might use a folder collection for blog posts, product pages, author data files, etc.
+
+Unlike file collections, folder collections have the option to allow editors to create new items in the collection. This is set by the boolean `create` field.
+
+Example:
+
+```yaml
+- label: "Blog"
+  name: "blog"
+  folder: "_posts/blog"
+  create: true
+  fields:
+    - {label: "Title", name: "title", widget: "string"}
+    - {label: "Publish Date", name: "date", widget: "datetime"}
+    - {label: "Featured Image", name: "thumbnail", widget: "image"}
+    - {label: "Body", name: "body", widget: "markdown"}
+```
+
+### Filtered folder collections
+
+The entries for any folder collection can be filtered based on the value of a single field. By filtering a folder into different collections, you can manage files with different fields, options, extensions, etc. in the same folder.
+
+The `filter` option requires two fields:
+
+- `field`: the name of the collection field to filter on
+- `value`: the desired field value
+
+The example below creates two collections in the same folder, filtered by the `language` field. The first collection includes posts with `language: en`, and the second, with `language: es`.
+
+``` yaml
+collections:
+  - label: "Blog in English"
+    name: "english_posts"
+    folder: "_posts"
+    filter: {field: "language", value: "en"}
+    fields:
+      - {label: "Language", name: "language", widget: "select", options: ["en", "es"]}
+      - {label: "Title", name: "title", widget: "string"}
+      - {label: "Content", name: "body", widget: "markdown"}      
+  - label: "Blog en Español"
+    name: "spanish_posts"
+    folder: "_posts"
+    filter: {field: "language", value: "es"}
+    fields:
+      - {label: "Lenguaje", name: "language", widget: "select", options: ["en", "es"]}
+      - {label: "Titulo", name: "title", widget: "string"}
+      - {label: "Contenido", name: "body", widget: "markdown"}      
+```
+
+
+## File collections
+
+File collections represent a single file or grouping of files, useful for unique files with a custom set of fields.
+
+### Single `file`
+
+Use `file` to specify a single file "collection". The value is a path to the file to be edited, relative to the base of the repository.
+
+Example using `file`:
+
+```yaml
+- label: "Site Settings"
+  name: "general"
+  file: "site/_data/settings.json"
+  extension: "json"
+  description: "General Site Settings"
+  fields:
+      - {label: "Global title", name: "site_title", widget: "string"}
+      - label: "Post Settings"
+        name: "posts"
+        widget: "object"
+        fields:
+            - {label: "Number of posts on frontpage", name: front_limit, widget: number}
+            - {label: "Default Author", name: author, widget: string}
+            - {label: "Default Thumbnail", name: thumb, widget: image, class: "thumb"}
+```
+
+### Multiple `files`
+
+You can group multiple files together under a single item in the collection list by using the `files` option. The option takes a list of single `file`-type collections.
+
+Example using `files`:
+
+``` yaml
+- label: "Pages"
+  name: "pages"
+  files:
+    - label: "About Page"
+      name: "about"
+      file: "site/content/about.yml"
+      fields:
+        - {label: Title, name: title, widget: string}
+        - {label: Intro, name: intro, widget: markdown}
+        - label: Team
+          name: team
+          widget: list
+          fields:
+            - {label: Name, name: name, widget: string}
+            - {label: Position, name: position, widget: string}
+            - {label: Photo, name: photo, widget: image}
+    - label: "Locations Page"
+      name: "locations"
+      file: "site/content/locations.yml"
+      fields:
+        - {label: Title, name: title, widget: string}
+        - {label: Intro, name: intro, widget: markdown}
+        - label: Locations
+          name: locations
+          widget: list
+          fields:
+            - {label: Name, name: name, widget: string}
+            - {label: Address, name: address, widget: string}
+```

website/src/css/imports/base.css

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