23 lines
945 B
Ruby
23 lines
945 B
Ruby
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class AddUniqueIndexOnMembers < ActiveRecord::Migration
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def self.up
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# Clean and reassign MemberRole rows if needed
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MemberRole.delete_all("member_id NOT IN (SELECT id FROM #{Member.table_name})")
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MemberRole.update_all("member_id =" +
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" (SELECT min(m2.id) FROM #{Member.table_name} m1, #{Member.table_name} m2" +
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" WHERE m1.user_id = m2.user_id AND m1.project_id = m2.project_id" +
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" AND m1.id = #{MemberRole.table_name}.member_id)")
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# Remove duplicates
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Member.connection.select_values("SELECT m.id FROM #{Member.table_name} m" +
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" WHERE m.id > (SELECT min(m1.id) FROM #{Member.table_name} m1 WHERE m1.user_id = m.user_id AND m1.project_id = m.project_id)").each do |i|
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Member.delete_all(["id = ?", i])
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end
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# Then add a unique index
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add_index :members, [:user_id, :project_id], :unique => true
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end
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def self.down
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remove_index :members, [:user_id, :project_id]
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end
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end
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