Tag nuke: remove implications to a tag before nuking it

app/logical/bulk_update_request_processor.rb

@@ -15,6 +15,7 @@ class BulkUpdateRequestProcessor
   class Error < StandardError; end
 
   attr_reader :bulk_update_request
+
   delegate :script, :forum_topic, to: :bulk_update_request
   validate :validate_script
   validate :validate_script_length
@@ -153,6 +154,12 @@ class BulkUpdateRequestProcessor
           TagBatchChangeJob.perform_later(args[0], args[1])
 
         when :nuke
+          # Reject existing implications from any other tag to the one we're nuking
+          # otherwise the tag won't be removed from posts that have those other tags
+          if PostQueryBuilder.new(args[0]).is_simple_tag?
+            TagImplication.active.where(consequent_name: args[0]).each(&:reject!)
+          end
+
           TagBatchChangeJob.perform_later(args[0], "-#{args[0]}")
 
         when :rename

test/unit/bulk_update_request_test.rb

@@ -320,11 +320,11 @@ class BulkUpdateRequestTest < ActiveSupport::TestCase
 
       context "the nuke command" do
         should "remove tags" do
-          @p1 = create(:post, tag_string: "foo")
-          @p2 = create(:post, tag_string: "bar")
-          @bur = create_bur!("nuke foo", @admin)
+          @post = create(:post, tag_string: "foo bar")
+          @bur1 = create_bur!("imply foo -> bar", @admin)
+          @bur2 = create_bur!("nuke bar", @admin)
 
-          assert_equal("tagme", @p1.reload.tag_string)
+          assert_equal("foo", @post.reload.tag_string)
         end
 
         should "remove pools" do