orm: use `text` as postgres default type

orm/cmd_utils.go

@@ -52,7 +52,11 @@ checkColumn:
 	case TypeBooleanField:
 		col = T["bool"]
 	case TypeCharField:
-		col = fmt.Sprintf(T["string"], fieldSize)
+		if al.Driver == DRPostgres && fi.toText {
+			col = T["string-text"]
+		} else {
+			col = fmt.Sprintf(T["string"], fieldSize)
+		}
 	case TypeTextField:
 		col = T["string-text"]
 	case TypeTimeField:

orm/models_info_f.go

@@ -119,6 +119,7 @@ type fieldInfo struct {
 	colDefault          bool
 	initial             StrTo
 	size                int
+	toText              bool
 	autoNow             bool
 	autoNowAdd          bool
 	rel                 bool
@@ -359,6 +360,7 @@ checkType:
 			}
 		} else {
 			fi.size = 255
+			fi.toText = true
 		}
 	case TypeTextField:
 		fi.index = false