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1 | class AddProjectsTrackersUniqueIndex < ActiveRecord::Migration | |
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2 | def self.up | |
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3 | remove_duplicates | |
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4 | add_index :projects_trackers, [:project_id, :tracker_id], :name => :projects_trackers_unique, :unique => true | |
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5 | end | |
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6 | ||
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7 | def self.down | |
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8 | remove_index :projects_trackers, :name => :projects_trackers_unique | |
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9 | end | |
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10 | ||
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11 | # Removes duplicates in projects_trackers table | |
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12 | def self.remove_duplicates | |
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13 | Project.find(:all).each do |project| | |
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14 | ids = project.trackers.collect(&:id) | |
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15 | unless ids == ids.uniq | |
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16 | project.trackers.clear | |
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17 | project.tracker_ids = ids.uniq | |
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18 | end | |
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19 | end | |
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20 | end | |
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21 | end | |
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