aliases/implications: remove processing state.

Remove the `processing` state from aliases and implications. This state
was used to mark when an alias or implication had been approved but the
alias or implication was still being processed. Aliases in the
processing state were still considered active, so there was no
functional difference between the active state and the processing state.

This fixes a problem where it was possible for implications to get stuck
in the processing state. This happened when a BUR contained a duplicate
implication. Transitioning from the processing state to the active state
failed in this case because we used `update` instead of `update!`, which
meant validation errors were silently ignored.

app/logical/d_text.rb

@@ -90,7 +90,7 @@ class DText
 
   def self.tag_request_message(obj)
     if obj.is_a?(TagRelationship)
-      if obj.is_approved?
+      if obj.is_active?
         "The #{obj.relationship} ##{obj.id} [[#{obj.antecedent_name}]] -> [[#{obj.consequent_name}]] has been approved."
       elsif obj.is_retired?
         "The #{obj.relationship} ##{obj.id} [[#{obj.antecedent_name}]] -> [[#{obj.consequent_name}]] has been retired."

app/models/tag_alias.rb

@@ -15,9 +15,8 @@ class TagAlias < TagRelationship
   end
 
   def process!(approver)
-    update!(approver: approver, status: "processing")
+    update!(approver: approver, status: "active")
     TagMover.new(antecedent_name, consequent_name, user: User.system).move!
-    update!(status: "active")
   rescue Exception => e
     update!(status: "error: #{e}")
     DanbooruLogger.log(e, tag_alias_id: id, antecedent_name: antecedent_name, consequent_name: consequent_name)

app/models/tag_implication.rb

@@ -126,9 +126,8 @@ class TagImplication < TagRelationship
       end
 
       CurrentUser.scoped(User.system) do
-        update(approver: approver, status: "processing")
+        update!(approver: approver, status: "active")
         update_posts
-        update(status: "active")
       end
     rescue Exception => e
       update(status: "error: #{e}")

app/models/tag_relationship.rb

@@ -15,8 +15,7 @@ class TagRelationship < ApplicationRecord
   belongs_to :antecedent_wiki, class_name: "WikiPage", foreign_key: "antecedent_name", primary_key: "title", optional: true
   belongs_to :consequent_wiki, class_name: "WikiPage", foreign_key: "consequent_name", primary_key: "title", optional: true
 
-  scope :active, -> {approved}
-  scope :approved, -> {where(status: %w[active processing])}
+  scope :active, -> {where(status: "active")}
   scope :deleted, -> {where(status: "deleted")}
   scope :expired, -> {where("created_at < ?", EXPIRY.days.ago)}
   scope :old, -> {where("created_at >= ? and created_at < ?", EXPIRY.days.ago, EXPIRY_WARNING.days.ago)}
@@ -24,7 +23,7 @@ class TagRelationship < ApplicationRecord
   scope :retired, -> {where(status: "retired")}
 
   before_validation :normalize_names
-  validates_format_of :status, :with => /\A(active|deleted|pending|processing|retired|error: .*)\Z/
+  validates_format_of :status, :with => /\A(active|deleted|pending|retired|error: .*)\Z/
   validates_presence_of :antecedent_name, :consequent_name
   validates :approver, presence: { message: "must exist" }, if: -> { approver_id.present? }
   validates :forum_topic, presence: { message: "must exist" }, if: -> { forum_topic_id.present? }
@@ -35,10 +34,6 @@ class TagRelationship < ApplicationRecord
     self.consequent_name = consequent_name.mb_chars.downcase.tr(" ", "_")
   end
 
-  def is_approved?
-    status.in?(%w[active processing])
-  end
-
   def is_rejected?
     status.in?(%w[retired deleted])
   end
@@ -73,13 +68,7 @@ class TagRelationship < ApplicationRecord
     end
 
     def status_matches(status)
-      status = status.downcase
-
-      if status == "approved"
-        where(status: %w[active processing])
-      else
-        where(status: status)
-      end
+      where(status: status.downcase)
     end
 
     def tag_matches(field, params)
@@ -89,7 +78,7 @@ class TagRelationship < ApplicationRecord
 
     def pending_first
       # unknown statuses return null and are sorted first
-      order(Arel.sql("array_position(array['processing', 'pending', 'active', 'deleted', 'retired'], status::text) NULLS FIRST, id DESC"))
+      order(Arel.sql("array_position(array['pending', 'active', 'deleted', 'retired'], status::text) NULLS FIRST, id DESC"))
     end
 
     def search(params)

app/views/tag_relationships/_search.html.erb

@@ -9,7 +9,7 @@
   <%= f.simple_fields_for :consequent_tag do |fa| %>
     <%= fa.input :category, label: "To Category", collection: TagCategory.canonical_mapping.to_a, include_blank: true, selected: params.dig(:search, :consequent_tag, :category) %>
   <% end %>
-  <%= f.input :status, label: "Status", collection: %w[Approved Active Pending Deleted Retired Processing], include_blank: true, selected: params[:search][:status] %>
+  <%= f.input :status, label: "Status", collection: %w[Active Pending Deleted Retired], include_blank: true, selected: params[:search][:status] %>
   <%= f.input :order, label: "Order", collection: [%w[Created created_at], %w[Updated updated_at], %w[Name name], %w[Tag\ count tag_count], %w[Status status]], include_blank: true, selected: params[:search][:order] %>
   <%= f.submit "Search" %>
 <% end %>

test/unit/tag_alias_test.rb

@@ -27,7 +27,6 @@ class TagAliasTest < ActiveSupport::TestCase
       should allow_value('active').for(:status)
       should allow_value('deleted').for(:status)
       should allow_value('pending').for(:status)
-      should allow_value('processing').for(:status)
       should allow_value('error: derp').for(:status)
 
       should_not allow_value('ACTIVE').for(:status)

test/unit/tag_implication_test.rb

@@ -23,7 +23,6 @@ class TagImplicationTest < ActiveSupport::TestCase
       should allow_value('active').for(:status)
       should allow_value('deleted').for(:status)
       should allow_value('pending').for(:status)
-      should allow_value('processing').for(:status)
       should allow_value('error: derp').for(:status)
 
       should_not allow_value('ACTIVE').for(:status)