mirror of
https://github.com/discourse/discourse.git
synced 2025-03-01 00:39:17 +00:00
03818e642a
This introduces new APIs for obtaining optimized thumbnails for topics. There are a few building blocks required for this:
- Introduces new `image_upload_id` columns on the `posts` and `topics` table. This replaces the old `image_url` column, which means that thumbnails are now restricted to uploads. Hotlinked thumbnails are no longer possible. In normal use (with pull_hotlinked_images enabled), this has no noticeable impact
- A migration attempts to match existing urls to upload records. If a match cannot be found then the posts will be queued for rebake
- Optimized thumbnails are generated during post_process_cooked. If thumbnails are missing when serializing a topic list, then a sidekiq job is queued
- Topic lists and topics now include a `thumbnails` key, which includes all the available images:
```
"thumbnails": [
{
"max_width": null,
"max_height": null,
"url": "//example.com/original-image.png",
"width": 1380,
"height": 1840
},
{
"max_width": 1024,
"max_height": 1024,
"url": "//example.com/optimized-image.png",
"width": 768,
"height": 1024
}
]
```
- Themes can request additional thumbnail sizes by using a modifier in their `about.json` file:
```
"modifiers": {
"topic_thumbnail_sizes": [
[200, 200],
[800, 800]
],
...
```
Remember that these are generated asynchronously, so your theme should include logic to fallback to other available thumbnails if your requested size has not yet been generated
- Two new raw plugin outlets are introduced, to improve the customisability of the topic list. `topic-list-before-columns` and `topic-list-before-link`
20 lines
622 B
Ruby
20 lines
622 B
Ruby
# frozen_string_literal: true
|
|
|
|
class AddTopicThumbnailInformation < ActiveRecord::Migration[6.0]
|
|
def change
|
|
add_reference :posts, :image_upload
|
|
add_reference :topics, :image_upload
|
|
|
|
add_column :theme_modifier_sets, :topic_thumbnail_sizes, :string, array: true
|
|
|
|
create_table :topic_thumbnails do |t|
|
|
t.references :upload, null: false
|
|
t.references :optimized_image, null: true
|
|
t.integer :max_width, null: false
|
|
t.integer :max_height, null: false
|
|
end
|
|
|
|
add_index :topic_thumbnails, [:upload_id, :max_width, :max_height], name: :unique_topic_thumbnails, unique: true
|
|
end
|
|
end
|