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root / db / migrate / 20090312194159_add_projects_trackers_unique_index.rb @ 912:5e80956cc792
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class AddProjectsTrackersUniqueIndex < ActiveRecord::Migration |
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def self.up |
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remove_duplicates |
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add_index :projects_trackers, [:project_id, :tracker_id], :name => :projects_trackers_unique, :unique => true |
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end
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def self.down |
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remove_index :projects_trackers, :name => :projects_trackers_unique |
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end
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# Removes duplicates in projects_trackers table
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def self.remove_duplicates |
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Project.find(:all).each do |project| |
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ids = project.trackers.collect(&:id)
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unless ids == ids.uniq
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project.trackers.clear |
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project.tracker_ids = ids.uniq |
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end
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end
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end
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end
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