feat: append column method

Author: bohdand-weka

orm/query.go

@@ -360,6 +360,30 @@ func (q *Query) ExcludeColumn(columns ...string) *Query {
 	return q
 }
 
+// AppendColumn appends column to the list of default columns if they weren't set,
+// while Column method overrides defaults
+func (q *Query) AppendColumn(columns ...string) *Query {
+	t := q.tableModel.Table()
+	if q.columns == nil {
+		for _, f := range t.Fields {
+			q.columns = append(q.columns, SafeQuery("?.?", t.Alias, f.Column))
+		}
+	}
+	return q.Column(columns...)
+}
+
+// AppendColumnExpr appends column expression to the list of default columns if they weren't set,
+// while ColumnExpr method overrides defaults
+func (q *Query) AppendColumnExpr(expr string, params ...interface{}) *Query {
+	t := q.tableModel.Table()
+	if q.columns == nil {
+		for _, f := range t.Fields {
+			q.columns = append(q.columns, SafeQuery("?.?", t.Alias, f.Column))
+		}
+	}
+	return q.ColumnExpr(expr, params...)
+}
+
 func (q *Query) excludeColumn(column string) bool {
 	for i := 0; i < len(q.columns); i++ {
 		app, ok := q.columns[i].(fieldAppender)
@@ -482,60 +506,60 @@ func (q *Query) WhereOr(condition string, params ...interface{}) *Query {
 
 // WhereGroup encloses conditions added in the function in parentheses.
 //
-//    q.Where("TRUE").
-//    	WhereGroup(func(q *pg.Query) (*pg.Query, error) {
-//    		q = q.WhereOr("FALSE").WhereOr("TRUE").
-//    		return q, nil
-//    	})
+//	q.Where("TRUE").
+//		WhereGroup(func(q *pg.Query) (*pg.Query, error) {
+//			q = q.WhereOr("FALSE").WhereOr("TRUE").
+//			return q, nil
+//		})
 //
 // generates
 //
-//    WHERE TRUE AND (FALSE OR TRUE)
+//	WHERE TRUE AND (FALSE OR TRUE)
 func (q *Query) WhereGroup(fn func(*Query) (*Query, error)) *Query {
 	return q.whereGroup(" AND ", fn)
 }
 
 // WhereGroup encloses conditions added in the function in parentheses.
 //
-//    q.Where("TRUE").
-//    	WhereNotGroup(func(q *pg.Query) (*pg.Query, error) {
-//    		q = q.WhereOr("FALSE").WhereOr("TRUE").
-//    		return q, nil
-//    	})
+//	q.Where("TRUE").
+//		WhereNotGroup(func(q *pg.Query) (*pg.Query, error) {
+//			q = q.WhereOr("FALSE").WhereOr("TRUE").
+//			return q, nil
+//		})
 //
 // generates
 //
-//    WHERE TRUE AND NOT (FALSE OR TRUE)
+//	WHERE TRUE AND NOT (FALSE OR TRUE)
 func (q *Query) WhereNotGroup(fn func(*Query) (*Query, error)) *Query {
 	return q.whereGroup(" AND NOT ", fn)
 }
 
 // WhereOrGroup encloses conditions added in the function in parentheses.
 //
-//    q.Where("TRUE").
-//    	WhereOrGroup(func(q *pg.Query) (*pg.Query, error) {
-//    		q = q.Where("FALSE").Where("TRUE").
-//    		return q, nil
-//    	})
+//	q.Where("TRUE").
+//		WhereOrGroup(func(q *pg.Query) (*pg.Query, error) {
+//			q = q.Where("FALSE").Where("TRUE").
+//			return q, nil
+//		})
 //
 // generates
 //
-//    WHERE TRUE OR (FALSE AND TRUE)
+//	WHERE TRUE OR (FALSE AND TRUE)
 func (q *Query) WhereOrGroup(fn func(*Query) (*Query, error)) *Query {
 	return q.whereGroup(" OR ", fn)
 }
 
 // WhereOrGroup encloses conditions added in the function in parentheses.
 //
-//    q.Where("TRUE").
-//    	WhereOrGroup(func(q *pg.Query) (*pg.Query, error) {
-//    		q = q.Where("FALSE").Where("TRUE").
-//    		return q, nil
-//    	})
+//	q.Where("TRUE").
+//		WhereOrGroup(func(q *pg.Query) (*pg.Query, error) {
+//			q = q.Where("FALSE").Where("TRUE").
+//			return q, nil
+//		})
 //
 // generates
 //
-//    WHERE TRUE OR NOT (FALSE AND TRUE)
+//	WHERE TRUE OR NOT (FALSE AND TRUE)
 func (q *Query) WhereOrNotGroup(fn func(*Query) (*Query, error)) *Query {
 	return q.whereGroup(" OR NOT ", fn)
 }
@@ -591,7 +615,7 @@ func (q *Query) addWhere(f queryWithSepAppender) {
 // WherePK adds condition based on the model primary keys.
 // Usually it is the same as:
 //
-//    Where("id = ?id")
+//	Where("id = ?id")
 func (q *Query) WherePK() *Query {
 	if !q.hasTableModel() {
 		q.err(errModelNil)
@@ -801,7 +825,7 @@ func (q *Query) countSelectQuery(column string) *SelectQuery {
 // First sorts rows by primary key and selects the first row.
 // It is a shortcut for:
 //
-//    q.OrderExpr("id ASC").Limit(1)
+//	q.OrderExpr("id ASC").Limit(1)
 func (q *Query) First() error {
 	table := q.tableModel.Table()
 
@@ -816,7 +840,7 @@ func (q *Query) First() error {
 // Last sorts rows by primary key and selects the last row.
 // It is a shortcut for:
 //
-//    q.OrderExpr("id DESC").Limit(1)
+//	q.OrderExpr("id DESC").Limit(1)
 func (q *Query) Last() error {
 	table := q.tableModel.Table()