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ACID properties are an important concept for databases. The acronym stands for Atomicity, Consistency, Isolation, and Durability.
The ACID properties of a DBMS allow safe sharing of data. Without these ACID properties, everyday occurrences such using computer systems to buy products would be difficult and the potential for inaccuracy would be huge. Imagine more than one person trying to buy the...
Stripe Integration in Laravel
Stripe is a US technology company, operating in over 25 countries, that allows both private individuals and businesses to accept payments over the Internet.
For integrating Stripe in Laravel, first add the Cashier package for Stripe to your composer.json file and run the composer update command:
Next, register the&nb...
Accessors and Mutators in Laravel
Defining An Accessor
To define an accessor, create a getFooAttribute method on your model where Foo is the "studly" cased name of the column you wish to access. In this example, we'll define an accessor for the first_name attribute. The accessor will automatically be called by Eloquent when attempting to retrieve the value of the first_name attribute:
Collations in MySQL and Laravel Database Settings
A collation is a set of rules that defines how to compare and sort character strings. Each collation in MySQL belongs to a single character set. Every character set has at least one collation, and most have two or more collations.
A collation orders characters based on weights. Each character in a character set maps to a weight. Characters with equal weights compare as equal, and characters wit...
CSRF Protection in Laravel
Laravel makes it easy to protect your application from cross-site request forgery (CSRF) attacks. Cross-site request forgeries are a type of malicious exploit whereby unauthorized commands are performed on behalf of an authenticated user.
Laravel automatically generates a CSRF "token" for each active user session managed by the application. This token is used to verify that ...
Resourceful Controllers in Laravel
Laravel resource routing assigns the typical "CRUD" routes to a controller with a single line of code. For example, you may wish to create a controller that handles all HTTP requests for "photos" stored by your application. Using the make:controller Artisan command, we can quickly create such a controller:
php artisan make:controller PhotoController...
Many To Many Relationships Laravel
Attaching / Detaching
Eloquent also provides a few additional helper methods to make working with related models more convenient. For example, let's imagine a user can have many roles and a role can have many users. To attach a role to a user by inserting a record in the intermediate table that joins the models, use the attach() method:
$user = App\User::find(1);
Eager Loading in Laravel
When accessing Eloquent relationships as properties, the relationship data is "lazy loaded". This means the relationship data is not actually loaded until you first access the property. However, Eloquent can "eager load" relationships at the time you query the parent model. Eager loading alleviates the N + 1 query problem. To illustrate the N + 1 query problem, consider a Book ...
Making Image Uploading Trait in Laravel
For uploading image in laravel we can simply make a trait and use it in any model and do the image upload. We can also do validations on the image which is explained in http://blog.samarthasinha.com/blog/making-validation-trait-laravel and http://blog.samarthasinha.com/blog/using-events-laravel-eloquent link. The code for image validation is below:
Stored Procedure in MySQL
A procedure (often called a stored procedure) is a subroutine like a subprogram in a regular computing language, stored in database. A procedure has a name, a parameter list, and SQL statement(s). All most all relational database system supports stored procedure, MySQL 5 introduce stored procedure.
Why Stored Procedures?
Stored procedures are fast. MySQL server takes s...