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Example code of zschuessler/model-json-attribute-guard-laravel

Informations about the package model-json-attribute-guard-laravel

JSON Column Guard

This package allows validation and custom casts for JSON columns.

Have you ever tried to use a json column, and:

  1. Validating schema of the column was difficult or messy
  2. Querying the column was onerous
  3. Casting types when saving models wasn't fun

Well now you can rest easy!

Example

You want to save user preferences. It's highly dynamic data, so you throw it into a json column:

Database Table Database Column Desired Schema
users preferences 
[
  {
    "name": "Favorite Band",
    "value": "Slenderbodies",
    "date_created": "2019-09-15",
    "date_updated": "2020-01-01"
    }
]

Here are problems:

  1. Can you enforce each key is valid?
  2. Can you enforce the two dates are valid dates?
  3. What about always ensuring the column is an array, regardless if a preference exists or not?

We can.

Step 1: Create The Validator Class

Let's use Laravel's own Validator syntax to describe what we want.

Under the hood Laravel's Validators are used: you can use any rule you want. Go nuts.

Step 2: Add a trait and cast to your Model

Let's tell Laravel we want our model to do a custom cast:

Step 3: Success

This code will work wonderfully:

Great! But the code below will throw a JsonAttributeValidationFailedException exception - oh no! Your model won't be saved.

This was a simple example. The possibilities are endless!

All versions of model-json-attribute-guard-laravel with dependencies

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Package Version
Requires php Version >=7.2
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