Yii2 FormModel & ActiveForm Tutorial | Complete Validation Rules Explained | Hindi Tutorial 17
In this video, we dive deep into Yii2’s \yii\base\Model (FormModel) and learn how to build powerful forms with ActiveForm. You’ll discover how to declare validation rules, connect them to your forms, and see real-time client-side validation in action.
We’ll cover all the available rules in Yii2, including:
✔ Required, Boolean, Integer, Number
✔ String length, Trim, Default values
✔ Email, URL, IP, Date, Time, Datetime
✔ Regex (Match), Compare, In, Filter
✔ File & Image uploads
✔ Each (array validation), Safe
✔ Unique & Exist (ActiveRecord-based)
✔ Custom inline validation
By the end of this video, you’ll have a complete reference to Yii2 validation rules and how to use them effectively with ActiveForm.
🔹Core Rules
required → must not be empty.
boolean → only true/false (0 or 1).
integer → integer values only.
number → integers & floats.
string → length validation (min, max, length).
trim → removes whitespace.
default → assign default values.
🔹 Format Validators
email → valid email address.
url → valid URL.
ip → IPv4/IPv6 validation.
date → checks valid date, allows formats.
time → validates time values.
datetime → validates datetime.
match → regex matching.
compare → compares with another attribute (e.g., password confirmation).
🔹 File Validators
file → upload single file.
image → upload image with size/dimension checks.
each → apply validation for array inputs.
🔹 Advanced Validators
in → value must be in a range.
unique → ensures unique values (ActiveRecord only).
exist → checks existence in another table (ActiveRecord).
filter → apply custom PHP function (strtolower, etc.).
safe → marks attribute as safe (no validation, but assignable).
👉 Watch till the end to see real-time examples of wrong input, error messages, and successful validation.
📌 This is part 1 of the Yii2 FormModel & Validation series. In the next video, we’ll explore Scenarios in depth.
Chapters-
00:00 - Introduction
00:23 - Why We Use FormModel
01:20 - What is FormModel
01:48 - How to Create FormModel
03:10 - What is Rules?
05:15 - How to Use FormModel
07:00 - How to Create ActiveForm
11:32 - Understand FormModel Data
16:00 - Usecase of Validators
31:13 - Summary
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