// Query runs a query within a transaction. See DbMap.Query for full
// documentation.
func (t *Transaction) Query(target interface{}) interfaces.Query {
return plans.Query(&t.dbmap.DbMap, &t.Transaction, target)
}
// Query returns a Query type, which can be used to generate and run
// queries using Go values instead of SQL literals. The main
// advantage to this method over e.g. dbMap.Select() is that most
// silly mistakes will get caught at compile time instead of run time.
// This method makes use of struct fields instead of column names, and
// ensures some basic sanity in query structure by way of the
// interface types that are used as return values.
//
// The target must be the pointer to a struct value, which will be
// used as the reference for all query construction methods. The
// struct's type must have been registered with AddTable.
//
// The struct's field addresses will be used to look up column names,
// so you have to use the same struct value for all method calls.
//
// When passing fields to be used for column lookup, always pass the
// address of the field that you want to add to the query within the
// reference struct that you passed to Query(). Here is a short
// example of how you might run a query using this method:
//
// // Allocate memory for a struct type to use as reference
// queryType := Model{}
//
// // Use the memory addresses of the model and its fields as
// // references to look up column names
// results, err := dbMap.Query(&queryType).
// Where().
// Equal(&queryType.Name, "foo").
// Greater(&queryType.StartDate, time.Now()).
// Select()
//
// See the interfaces package for details on what the query types are
// capable of.
func (m *DbMap) Query(target interface{}) interfaces.Query {
gorpMap := &m.DbMap
return plans.Query(gorpMap, gorpMap, target)
}