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Include pinned topics in category list.

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- removes an (n+1) query for user data
- supports the preload store for the data to avoid a second request
- fix a bug where uncategorizes was reporting (0, 0, 0) for topics by week, month, year
This commit is contained in:
Robin Ward 2013-05-28 14:54:00 -04:00
parent 29bf540a34
commit 560fb15d8a
9 changed files with 146 additions and 85 deletions
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15
app/assets/javascripts/discourse/models/category_list.js
View File

@ -31,7 +31,10 @@ Discourse.CategoryList.reopenClass({
var uncategorized = Discourse.Category.uncategorizedInstance();
uncategorized.setProperties({
topics: c.topics,
featured_users: c.featured_users
featured_users: c.featured_users,
topics_week: c.topics_week,
topics_month: c.topics_month,
topics_year: c.topics_year
});
categories.pushObject(uncategorized);
} else {
@ -43,8 +46,16 @@ Discourse.CategoryList.reopenClass({
list: function(filter) {
var route = this;
var finder = null;
if (filter === 'categories') {
finder = PreloadStore.getAndRemove("categories_list", function() {
return Discourse.ajax("/categories.json")
});
} else {
finder = Discourse.ajax("/" + filter + ".json")
}
return Discourse.ajax("/" + filter + ".json").then(function(result) {
return finder.then(function(result) {
var categoryList = Discourse.TopicList.create();
categoryList.set('can_create_category', result.category_list.can_create_category);
categoryList.set('can_create_topic', result.category_list.can_create_topic);

2
app/controllers/categories_controller.rb
View File

@ -9,6 +9,8 @@ class CategoriesController < ApplicationController
def index
@list = CategoryList.new(guardian)
discourse_expires_in 1.minute
store_preloaded("categories_list", MultiJson.dump(CategoryListSerializer.new(@list, scope: guardian)))
respond_to do |format|
format.html { render }
format.json { render_serialized(@list, CategoryListSerializer) }

2
app/models/category.rb
View File

@ -62,6 +62,8 @@ class Category < ActiveRecord::Base
topics_week = (#{topics_week})")
end
attr_accessor :displayable_topics
# Internal: Generate the text of post prompting to enter category
# description.
def self.post_template

24
app/models/category_featured_topic.rb
View File

@ -16,22 +16,14 @@ class CategoryFeaturedTopic < ActiveRecord::Base
return if c.blank?
CategoryFeaturedTopic.transaction do
exec_sql "DELETE FROM category_featured_topics WHERE category_id = :category_id", category_id: c.id
exec_sql "INSERT INTO category_featured_topics (category_id, topic_id, created_at, updated_at)
SELECT :category_id,
ft.id,
CURRENT_TIMESTAMP,
CURRENT_TIMESTAMP
FROM topics AS ft
WHERE ft.category_id = :category_id
AND ft.visible
AND ft.deleted_at IS NULL
AND ft.archetype <> :private_message
ORDER BY ft.bumped_at DESC
LIMIT :featured_limit",
category_id: c.id,
private_message: Archetype.private_message,
featured_limit: SiteSetting.category_featured_topics
CategoryFeaturedTopic.delete_all(category_id: c.id)
query = TopicQuery.new(nil, per_page: SiteSetting.category_featured_topics)
results = query.list_category(c)
if results.present?
results.topic_ids.each_with_index do |topic_id, idx|
c.category_featured_topics.create(topic_id: topic_id, rank: idx)
end
end
end
end

163
app/models/category_list.rb
View File

@ -3,81 +3,118 @@ class CategoryList
attr_accessor :categories, :topic_users, :uncategorized
def initialize(guardian)
guardian ||= Guardian.new
def initialize(guardian=nil)
@guardian = guardian || Guardian.new
@categories = Category
.includes(featured_topics: [:category])
.includes(:featured_users)
.where('topics.visible' => true)
.secured(guardian)
.order('categories.topics_week desc, categories.topics_month desc, categories.topics_year desc')
find_relevant_topics
find_categories
add_uncategorized
find_user_data
end
private
@categories = @categories.to_a
# Retrieve a list of all the topics we'll need
def find_relevant_topics
@topics_by_category_id = {}
category_featured_topics = CategoryFeaturedTopic.select([:category_id, :topic_id]).order(:rank)
@topics_by_id = {}
# Support for uncategorized topics
uncategorized_topics = Topic
.listable_topics
.where(category_id: nil)
.topic_list_order
.limit(SiteSetting.category_featured_topics)
if uncategorized_topics.present?
totals = Topic.exec_sql("SELECT SUM(CASE WHEN created_at >= (CURRENT_TIMESTAMP - INTERVAL '1 WEEK') THEN 1 ELSE 0 END) as topics_week,
SUM(CASE WHEN created_at >= (CURRENT_TIMESTAMP - INTERVAL '1 MONTH') THEN 1 ELSE 0 END) as topics_month,
SUM(CASE WHEN created_at >= (CURRENT_TIMESTAMP - INTERVAL '1 YEAR') THEN 1 ELSE 0 END) as topics_year,
COUNT(*) AS topic_count
FROM topics
WHERE topics.visible
AND topics.deleted_at IS NULL
AND topics.category_id IS NULL
AND topics.archetype <> '#{Archetype.private_message}'").first
uncategorized = Category.new({name: SiteSetting.uncategorized_name,
slug: Slug.for(SiteSetting.uncategorized_name),
color: SiteSetting.uncategorized_color,
text_color: SiteSetting.uncategorized_text_color,
featured_topics: uncategorized_topics}.merge(totals))
# Find the appropriate place to insert it:
insert_at = nil
@categories.each_with_index do |c, idx|
if totals['topics_week'].to_i > (c.topics_week || 0)
insert_at = idx
break
end
@all_topics = Topic.where(id: category_featured_topics.map(&:topic_id))
@all_topics.each do |t|
@topics_by_id[t.id] = t
end
@categories.insert(insert_at || @categories.size, uncategorized)
category_featured_topics.each do |cft|
@topics_by_category_id[cft.category_id] ||= []
@topics_by_category_id[cft.category_id] << cft.topic_id
end
end
unless guardian.can_create?(Category)
# Remove categories with no featured topics unless we have the ability to edit one
@categories.delete_if { |c| c.featured_topics.blank? }
else
# Show all categories to people who have the ability to edit and delete categories
if @categories.size > 0
@categories.insert(@categories.size, *Category.where('id not in (?)', @categories.map(&:id).compact).to_a)
else
@categories = Category.all.to_a
# Find a list of all categories to associate the topics with
def find_categories
@categories = Category
.includes(:featured_users)
.secured(@guardian)
.order('COALESCE(categories.topics_week, 0) DESC')
.order('COALESCE(categories.topics_month, 0) DESC')
.order('COALESCE(categories.topics_year, 0) DESC')
@categories = @categories.to_a
@categories.each do |c|
topics_in_cat = @topics_by_category_id[c.id]
if topics_in_cat.present?
c.displayable_topics = []
topics_in_cat.each do |topic_id|
topic = @topics_by_id[topic_id]
topic.category = c
c.displayable_topics << topic
end
end
end
end
# Add the uncategorized "magic" category
def add_uncategorized
# Support for uncategorized topics
uncategorized_topics = Topic
.listable_topics
.where(category_id: nil)
.topic_list_order
.limit(SiteSetting.category_featured_topics)
if uncategorized_topics.present?
totals = Topic.exec_sql("SELECT SUM(CASE WHEN created_at >= (CURRENT_TIMESTAMP - INTERVAL '1 WEEK') THEN 1 ELSE 0 END) as topics_week,
SUM(CASE WHEN created_at >= (CURRENT_TIMESTAMP - INTERVAL '1 MONTH') THEN 1 ELSE 0 END) as topics_month,
SUM(CASE WHEN created_at >= (CURRENT_TIMESTAMP - INTERVAL '1 YEAR') THEN 1 ELSE 0 END) as topics_year,
COUNT(*) AS topic_count
FROM topics
WHERE topics.visible
AND topics.deleted_at IS NULL
AND topics.category_id IS NULL
AND topics.archetype <> '#{Archetype.private_message}'").first
uncategorized = Category.new({name: SiteSetting.uncategorized_name,
slug: Slug.for(SiteSetting.uncategorized_name),
color: SiteSetting.uncategorized_color,
text_color: SiteSetting.uncategorized_text_color,
featured_topics: uncategorized_topics}.merge(totals))
# Find the appropriate place to insert it:
insert_at = nil
@categories.each_with_index do |c, idx|
if uncategorized.topics_week > (c.topics_week || 0)
insert_at = idx
break
end
end
@categories.insert(insert_at || @categories.size, uncategorized)
end
if @all_topics.present?
uncategorized.displayable_topics = uncategorized_topics
@all_topics << uncategorized_topics
@all_topics.flatten!
end
end
# Remove any empty topics unless we can create them (so we can see the controls)
def prune_empty
unless @guardian.can_create?(Category)
# Remove categories with no featured topics unless we have the ability to edit one
@categories.delete_if { |c| c.displayable_topics.blank? }
end
end
# Get forum topic user records if appropriate
if guardian.current_user
topics = []
@categories.each { |c| topics << c.featured_topics }
topics << @uncategorized
def find_user_data
if @guardian.current_user && @all_topics.present?
topic_lookup = TopicUser.lookup_for(@guardian.current_user, @all_topics)
topics.flatten! if topics.present?
topics.compact! if topics.present?
topic_lookup = TopicUser.lookup_for(guardian.current_user, topics)
# Attach some data for serialization to each topic
topics.each { |ft| ft.user_data = topic_lookup[ft.id] }
# Attach some data for serialization to each topic
@all_topics.each { |ft| ft.user_data = topic_lookup[ft.id] }
end
end
end
end

5
app/models/topic_list.rb
View File

@ -41,6 +41,11 @@ class TopicList
return @topics
end
def topic_ids
return [] if @topics_input.blank?
@topics_input.map {|t| t.id}
end
def filter_summary
@filter_summary ||= get_summary
end

6
app/serializers/category_detailed_serializer.rb
View File

@ -13,7 +13,7 @@ class CategoryDetailedSerializer < ApplicationSerializer
:is_uncategorized
has_many :featured_users, serializer: BasicUserSerializer
has_many :featured_topics, serializer: CategoryTopicSerializer, embed: :objects, key: :topics
has_many :displayable_topics, serializer: CategoryTopicSerializer, embed: :objects, key: :topics
def topics_week
object.topics_week || 0
@ -35,4 +35,8 @@ class CategoryDetailedSerializer < ApplicationSerializer
is_uncategorized
end
def include_displayable_topics?
return displayable_topics.present?
end
end

8
app/views/categories/index.html.erb
View File

@ -2,9 +2,11 @@
<div class="category">
<h2><a href="/category/<%= c.slug.blank? ? c.id : c.slug %>"><%= c.name %></a></h2>
<div class="topic-list">
<% c.topics.limit(6).each do |t| %>
<a href="<%= t.relative_url %>"><%= t.title %></a> <span title='<%= t 'posts' %>'>(<%= t.posts_count %>)</span><br/>
<% end %>
<%- if c.displayable_topics.present? %>
<% c.displayable_topics.each do |t| %>
<a href="<%= t.relative_url %>"><%= t.title %></a> <span title='<%= t 'posts' %>'>(<%= t.posts_count %>)</span><br/>
<% end %>
<%- end %>
</div>
</div>
<% end %>

6
db/migrate/20130528174147_add_rank_to_category_featured_topics.rb Normal file
View File

@ -0,0 +1,6 @@
class AddRankToCategoryFeaturedTopics < ActiveRecord::Migration
def change
add_column :category_featured_topics, :rank, :integer, default: 0, null: false
add_index :category_featured_topics, [:category_id, :rank]
end
end