func (s *Storage) PoolsConstraints() *storage.Collection {
	poolConstraintIndex := mgo.Index{Key: []string{"poolexpr", "field"}, Unique: true}
	c := s.Collection("pool_constraints")
	c.EnsureIndex(poolConstraintIndex)
	return c
}
func (s *Storage) PoolsConstraints() *storage.Collection {
	poolConstraintIndex := mgo.Index{Key: []string{"poolexpr", "field"}, Unique: true}
	c := s.Collection("pool_constraints")
	c.EnsureIndex(poolConstraintIndex)
	return c
}
func ( s * Storage ) PoolsConstraints ( ) * storage . Collection { poolConstraintIndex := mgo . Index { Key : [ ] string { " " , " " } , Unique : true } c := s . Collection ( " " ) c . EnsureIndex ( poolConstraintIndex ) return c }
// PoolsConstraints return the pool constraints collection.
PoolsConstraints return the pool constraints collection .