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Enforced unicity of relations between 2 issues with a database index (#9685). 

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@8041 e93f8b46-1217-0410-a6f0-8f06a7374b81
This commit is contained in:
Etienne Massip 2011-12-03 12:12:53 +00:00
parent 7e62d02abb
commit 39ae7b66f8
1 changed files with 16 additions and 0 deletions
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16
db/migrate/20111201201315_add_unique_index_to_issue_relations.rb Normal file
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class AddUniqueIndexToIssueRelations < ActiveRecord::Migration
def self.up
# Remove duplicates
IssueRelation.connection.select_values("SELECT r.id FROM #{IssueRelation.table_name} r" +
" WHERE r.id > (SELECT min(r1.id) FROM #{IssueRelation.table_name} r1 WHERE r1.issue_from_id = r.issue_from_id AND r1.issue_to_id = r.issue_to_id)").each do |i|
IssueRelation.delete_all(["id = ?", i])
end
add_index :issue_relations, [:issue_from_id, :issue_to_id], :unique => true
end
def self.down
remove_index :issue_relations, :column => [:issue_from_id, :issue_to_id]
end
end