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-rw-r--r--activerecord/lib/active_record/connection_adapters/sqlite_adapter.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/sqlite_adapter.rb b/activerecord/lib/active_record/connection_adapters/sqlite_adapter.rb
index e80b465bab..ca84c95bdc 100644
--- a/activerecord/lib/active_record/connection_adapters/sqlite_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/sqlite_adapter.rb
@@ -530,7 +530,7 @@ module ActiveRecord
unless columns.empty?
# index name can't be the same
- opts = { :name => name.gsub(/_(#{from})_/, "_#{to}_") }
+ opts = { :name => name.gsub(/(^|_)(#{from})_/, "\\1#{to}_") }
opts[:unique] = true if index.unique
add_index(to, columns, opts)
end