Relational databases do not support inheritance so if we need to represent it, we have to somehow store meta info while keeping performance by minimizing JOINs. One way to solve this problem is using single table inheritance. All fields for the whole class tree are stored in a single table. Class name is stored in the type field...
I ran into a problem and on irc we worked it out. Since there is a lack on information on filters in genral i thought i'd start sharing all my findings, might be usefull for other people.
This is an incipient implementation of application-driven database with Yii.
/*
Get class constants by token.
If you set constants with same prefix, like:
MY_STATUS_1
MY_STATUS_2
MY_STATUS_3
Suppose to have two models: Users and Emails. You do not want to store email in a Users model. And User can have 0 or many emails. This is the form generated to create a new user (just username).
Sometimes writing views like
This is a reference about model validators and user roles. In many cases we want model validators to applied only for some privileged users or not
So you want to use CForm (form builder), but need to preload dropdowns in a form? It's simpler than it seems.
You got your CFormModel, CForm and the actual Form, right?
Let's say you have the typical State -> City dependent dropdowns, so you would want to load the from with the State and City selected.
This is a reference to be used for Model rule validation and is compiled from the Yii documentation and code. The purpose is to have all the information gathered in one place instead of scattered. This reference is not an intro. See The Definitive Guide to Yii, Declaring Validation Rules for a tutorial.
Suppose you have an Application in Yii that manages hotels each one has many customers.
There are cases that you want to validate the file format, size, extension etc but how to do that without submit the form ?
There are cases you want to update a record on CGridview directly
Note the tag {{homeUrl}} will be dynamically replaced at runtime.
Everyone have seen a multilayer menu in several CMS
Suppose we want to set a category to product (or an item in general term), Also suppose categories has sub-categories (multi-level)
CGridview displays existent rows of the table (using DataProvider)
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 ?
The yii2-field-range extension enables you to easily setup ActiveField range fields with Bootstrap styling. You basically can setup two attributes joined together like a single field with combined validation error block.
Suppose you have Products,Categories and each product belongs in many categories
Efficient coding with Yii implies efficient use of the code generator. This article shares the personalised Gii templates that were built starting from the standard templates proposed by AweGen.