Solution to the problem that ThinkPHP 5 data cannot be saved after updating

When using ThinkPHP 5, when we need to update a piece of data in the database, we usually use the $model->save() function to save it. However, in some cases, we may encounter such an error message: The data cannot be saved after updating. What to do in this situation? This article will introduce you to several possible solutions.

Method 1: Check whether the data has been updated

When using the $model->save() function for update operations, if the data is not updated, then $model->save( ) function will return false and prompt an error message that the data cannot be saved after updating. Therefore, we can first check whether the data has actually been updated.

First, we need to use the $model->isDirty() function to determine whether the data has been updated. For example:

if ($model->isDirty()) {
    $result = $model->save();
} else {
    $result = true;
}

If the data has not been updated, then the $model->isDirty() function will return false, the $model->save() function will not be executed, and the variable $result will be assigned a value. is true.

Method 2: Turn off data auto-fill

When using the $model->save() function for update operations, if a field is defined as read-only or auto-fill, then $ The model->save() function will return false and prompt an error message that the data cannot be saved after updating. At this time, we can try to turn off the data autofill function. The specific steps are as follows:

1. Open the application's database configuration file config/database.php, find the $params array, and set the 'auto_timestamp' option in it to false:

'params' => [
    // 数据库表前缀
    'prefix' => '',
    // 关闭字段自动类型转换
    'fields_strict' => false,
    // 关闭自动写入时间戳
    'auto_timestamp' => false,
],

2. In the model that needs to be updated, use $model->allowField(true) to indicate not to use the auto-fill function:

$result = $model->allowField(true)->save($data);

After doing this, you can turn off the data auto-fill function to avoid the problem that some fields are defined as read-only or automatically populated and cannot be updated.

Method 3: Manually specify the fields that need to be updated

When using the $model->save() function for update operations, we can manually specify the fields that need to be updated, as follows:

$result = $model->save([
    'name' => $name,
    'age'  => $age,
], ['id' => $id]);

After specifying in this way, when updating data, only the specified fields will be saved, avoiding the problem that some fields are defined as read-only or automatically filled and cannot be updated.

Summary

When we use ThinkPHP 5 to update data, we may encounter the problem that the data cannot be saved after updating. To address this problem, we can use the $model->isDirty() function to check whether the data has been updated, or turn off the data auto-fill function. If the problem still cannot be solved, then we can manually specify the fields that need to be updated to solve the problem.

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