Don't drop in DropAndReaddHasExternalWikiInProjects

Dropping a column and then re-adding it can lead to the application throwing errors as the column may temporarily not exist. To work around this we'll reset the various project rows in batches _without_ removing any columns.

Don't drop in DropAndReaddHasExternalWikiInProjects
b7c5cf9e · Yorick Peterse · 2d7516ff · b7c5cf9e
Unverified Commit b7c5cf9e authored Jul 21, 2016 by Yorick Peterse
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Showing with 3 additions and 2 deletions

20160721081015_drop_and_readd_has_external_wiki_in_projects.rb ...721081015_drop_and_readd_has_external_wiki_in_projects.rb +3 -2

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--- a/db/migrate/20160721081015_drop_and_readd_has_external_wiki_in_projects.rb
+++ b/db/migrate/20160721081015_drop_and_readd_has_external_wiki_in_projects.rb
@@ -5,8 +5,9 @@ class DropAndReaddHasExternalWikiInProjects < ActiveRecord::Migration
  DOWNTIME = false

  def up
-    remove_column :projects, :has_external_wiki, :boolean
-    add_column :projects, :has_external_wiki, :boolean
+    update_column_in_batches(:projects, :has_external_wiki, nil) do |table, query|
+      query.where(table[:has_external_wiki].not_eq(nil))
+    end
  end

  def down