Rename categories collection to dataset_categories

Jekyll comes with a built-in `site.categories` collection, so we're renaming this to avoid conflict, should any JKAN users want to take advantage of the built-in collection.

Author: timwis

_config.yml

@@ -30,15 +30,15 @@ collections:
   organizations:
     output: true
     permalink: /organizations/:path/
-  categories:
+  dataset_categories:
     output: true
     permalink: /categories/:path/
 
 # Collections (cont'd)
 defaults:
   - scope:
       path: ""
-      type: categories
+      type: dataset_categories
     values:
       layout: category
   - scope:

_categories/arts-culture-history.md _dataset_categories/arts-culture-history.md

@@ -7,7 +7,7 @@
 
 <a href="{{ site.baseurl }}/add-category/" class="btn btn-outline-secondary float-right admin-only" data-hook="add-category-btn"><i class="fa fa-plus"></i> Add category</a>
 
-{% for category in site.categories %}
+{% for category in site.dataset_categories %}
   {% assign dataset_count = site.datasets | where:"category", category.name | size %}
   <div class="media">
     <div class="mr-3">

_categories/budget-finance.md _dataset_categories/budget-finance.md

@@ -7,8 +7,9 @@ backend:
 media_folder: "img/uploads"
 
 collections:
-  - name: dataset
-    label: Dataset
+  - name: datasets
+    label: Datasets
+    label_singular: Dataset
     folder: _datasets
     create: true
     summary: "{{title}} ({{organization}})"
@@ -25,7 +26,7 @@ collections:
         name: organization
         required: false
         widget: relation
-        collection: organization
+        collection: organizations
         value_field: "title"
         search_fields:
           - title
@@ -75,11 +76,11 @@ collections:
         name: category
         required: false
         widget: relation
+        collection: categories
         multiple: true
-        collection: settings
-        file: categories
-        value_field: "items.*.name"
-        search_fields: ["items.*.name"]
+        value_field: "name"
+        search_fields:
+          - name
 
       - label: Maintainer
         name: maintainer
@@ -91,8 +92,9 @@ collections:
         required: false
         widget: string
 
-  - name: organization
-    label: Organization
+  - name: organizations
+    label: Organizations
+    label_singular: Organization
     folder: _organizations
     create: true
     preview_path: "organizations/{{slug}}"
@@ -115,7 +117,8 @@ collections:
 
   - name: categories
     label: Categories
-    folder: _categories
+    label_singular: Category
+    folder: _dataset_categories
     description: Dataset categories
     create: true
     preview_path: "categories/{{slug}}"

_categories/economy.md _dataset_categories/economy.md

@@ -13,7 +13,7 @@ <h1 class="display-4">{{ site.greeting }}</h1>
 
 <h3>Browse by Category</h3>
 <div class="homepage-categories">
-{% for category in site.categories %}
+{% for category in site.dataset_categories %}
   {% if category.featured == true %}
     {% capture logo_alt %}{{ category.name }}{% if category.logo_credit and category.logo_credit != empty %} logo by {{ category.logo_credit }}{% endif %}{% endcapture %}
     <a href="{{ site.baseurl }}/categories/{{ category.name | slugify }}" class="thumbnail" title="{{ logo_alt }}">