The only differences in Yii 2 is that its much simpler due to available functions in the Model class for loading and validating models.
Yii Framework Wiki
Wiki articles tagged with "save"
Showing 1-6 of 6 items.
How to store array/widget configuration to the database with config validation rules
Note the tag {{homeUrl}} will be dynamically replaced at runtime.
Save and Display Date/Time Fields in different formats in Yii2
You would find having such a need in most Yii Projects. Your database needs a specific format to store date fields, while you may want to display it in different formats to the users on forms and other views.
Save or Update Multiple related model values in one Tabular input form
Created 10 years ago by Kostas Apazidis (KonApaz),
updated 10 years ago by Kostas Apazidis (KonApaz).
In this wiki I will show you how to save/update a model with many related model For example: How to set a product to multiple categories only in one post form ?
Save uploaded file with any filename characters
Created 9 years ago by Kostas Apazidis (KonApaz),
updated 9 years ago by Kostas Apazidis (KonApaz).
First of all this is a very common problem, for more details see this post http://www.yiiframework.com/forum/index.php/topic/52052-upload-file-with-any-charset/
Sort and save order of model-elements drag & drop
Created 9 years ago by Kostas Apazidis (KonApaz),
updated 9 years ago by Kostas Apazidis (KonApaz).
Suppose you have Products,Categories and each product belongs in many categories