annotate db/migrate/.svn/text-base/20101104182107_add_unique_index_on_members.rb.svn-base @ 904:0a8317a50fa0
redmine-1.1
Close obsolete branch redmine-1.1
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Chris Cannam |
date |
Fri, 14 Jan 2011 12:53:21 +0000 |
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af80e5618e9b |
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1 class AddUniqueIndexOnMembers < ActiveRecord::Migration
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2 def self.up
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3 # Clean and reassign MemberRole rows if needed
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4 MemberRole.delete_all("member_id NOT IN (SELECT id FROM #{Member.table_name})")
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5 MemberRole.update_all("member_id =" +
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6 " (SELECT min(m2.id) FROM #{Member.table_name} m1, #{Member.table_name} m2" +
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7 " WHERE m1.user_id = m2.user_id AND m1.project_id = m2.project_id" +
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8 " AND m1.id = #{MemberRole.table_name}.member_id)")
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9 # Remove duplicates
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10 Member.connection.select_values("SELECT m.id FROM #{Member.table_name} m" +
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11 " 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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12 Member.delete_all(["id = ?", i])
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13 end
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14
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15 # Then add a unique index
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16 add_index :members, [:user_id, :project_id], :unique => true
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17 end
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18
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19 def self.down
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20 remove_index :members, [:user_id, :project_id]
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21 end
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22 end
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