[#3790] added MaxSize json field option

migrations/1702134272_set_default_json_max_size.go

@@ -0,0 +1,51 @@
+package migrations
+
+import (
+	"github.com/pocketbase/dbx"
+	"github.com/pocketbase/pocketbase/daos"
+	"github.com/pocketbase/pocketbase/models"
+	"github.com/pocketbase/pocketbase/models/schema"
+)
+
+// Update all collections with json fields to have a default MaxSize json field option.
+func init() {
+	AppMigrations.Register(func(db dbx.Builder) error {
+		dao := daos.New(db)
+
+		// note: update even the view collections to prevent
+		// unnecessary change detections during the automigrate
+		collections := []*models.Collection{}
+		if err := dao.CollectionQuery().All(&collections); err != nil {
+			return err
+		}
+
+		for _, collection := range collections {
+			var needSave bool
+
+			for _, f := range collection.Schema.Fields() {
+				if f.Type != schema.FieldTypeJson {
+					continue
+				}
+
+				options, _ := f.Options.(*schema.JsonOptions)
+				if options != nil {
+					options = &schema.JsonOptions{}
+				}
+				options.MaxSize = 5242880 // 5mb
+				f.Options = options
+				needSave = true
+			}
+
+			if !needSave {
+				continue
+			}
+
+			// save only the collection model without updating its records table
+			if err := dao.Save(collection); err != nil {
+				return err
+			}
+		}
+
+		return nil
+	}, nil)
+}