JSON issue fix

README.md

@@ -408,4 +408,3 @@ Professional support, consulting as well as software development services are av
 https://www.cebe.cc/en/contact
 
 Development of this library is sponsored by [cebe.:cloud: "Your Professional Deployment Platform"](https://cebe.cloud).
-

src/lib/migrations/BaseMigrationBuilder.php

@@ -15,7 +15,7 @@
 use Yii;
 use yii\db\ColumnSchema;
 use yii\helpers\VarDumper;
-use yii\db\Connection;
+use yii\db\{Connection, Expression};
 
 abstract class BaseMigrationBuilder
 {
@@ -477,4 +477,23 @@ public static function isEnumValuesChanged(
         }
         return false;
     }
+
+    public function isDefaultValueChanged(ColumnSchema $current,
+        ColumnSchema $desired): bool
+    {
+        // if the default value is object of \yii\db\Expression then default value is expression instead of constant. See https://dev.mysql.com/doc/refman/8.0/en/data-type-defaults.html
+        // in such case instead of comparing two objects, we should compare expression
+
+        if ($current->defaultValue instanceof Expression &&
+            $desired->defaultValue instanceof Expression
+            && $current->defaultValue->expression === $desired->defaultValue->expression
+        ) {
+            return false;
+        }
+
+        if ($current->defaultValue !== $desired->defaultValue) {
+            return true;
+        }
+        return false;
+    }
 }

src/lib/migrations/MysqlMigrationBuilder.php

@@ -53,8 +53,14 @@ protected function compareColumns(ColumnSchema $current, ColumnSchema $desired):
                     , 'dbType', 'phpType'
                     , 'precision', 'scale', 'unsigned'
         ] as $attr) {
-            if ($current->$attr !== $desiredFromDb->$attr) {
-                $changedAttributes[] = $attr;
+            if ($attr === 'defaultValue') {
+                if ($this->isDefaultValueChanged($current, $desiredFromDb)) {
+                    $changedAttributes[] = $attr;
+                }
+            } else {
+                if ($current->$attr !== $desiredFromDb->$attr) {
+                    $changedAttributes[] = $attr;
+                }
             }
         }
         return $changedAttributes;

src/lib/migrations/PostgresMigrationBuilder.php

@@ -124,8 +124,14 @@ protected function compareColumns(ColumnSchema $current, ColumnSchema $desired):
                     , 'dbType', 'phpType'
                     , 'precision', 'scale', 'unsigned'
         ] as $attr) {
-            if ($current->$attr !== $desiredFromDb->$attr) {
-                $changedAttributes[] = $attr;
+            if ($attr === 'defaultValue') {
+                if ($this->isDefaultValueChanged($current, $desiredFromDb)) {
+                    $changedAttributes[] = $attr;
+                }
+            } else {
+                if ($current->$attr !== $desiredFromDb->$attr) {
+                    $changedAttributes[] = $attr;
+                }
             }
         }
         return $changedAttributes;