1/17/2024 0 Comments Laravel 5.2 eloquent eventsThe name passed to the connection method should correspond to one of the connections listed in your config/database. When using multiple connections, you may access each connection via the connection method on the DB facade. The Eloquent collection object extends Laravels base collection, so it naturally inherits dozens of methods used to. In addition to custom accessors and mutators, Eloquent can also automatically cast date fields to Carbon instances or even cast text fields to JSON. All Eloquent methods that return more than one model result will return instances of the IlluminateDatabaseEloquentCollection class, including results retrieved via the get method or accessed via a relationship. It is up to you to decide if this is the desired behavior for your application. For example, you may want to use the Laravel encrypter to encrypt a value while it is stored in the database, and then automatically decrypt the attribute when you access it on an Eloquent model. Models allow you to query for data in your tables, as well as insert new records into the table. Each database table has a corresponding 'Model' which is used to interact with that table. This ensures that any data written during the request cycle can be immediately read back from the database during that same request. The Eloquent ORM included with Laravel provides a beautiful, simple ActiveRecord implementation for working with your database. If the sticky option is enabled and a "write" operation has been performed against the database during the current request cycle, any further "read" operations will use the "write" connection. The sticky option is an optional value that can be used to allow the immediate reading of records that have been written to the database during the current request cycle. The database credentials, prefix, character set, and all other options in the main mysql array will be shared across both connections. So, in this case, 192.168.1.1 will be used as the host for the "read" connection, while 192.168.1.3 will be used for the "write" connection. Each migration filename contains a timestamp that allows Laravel to determine the order of the migrations: php artisan make:migration createflightstable. The new migration will be placed in your database/migrations directory. registerModelEvent (string event, QueuedClosure Closure string callback) Register a model event with the dispatcher. removeObservableEvents (arraymixed observables) Remove an observable event name. Laravel 5.4 continues the improvements made in Laravel 5.3 by adding support for Markdown based emails and notifications, the Laravel Dusk browser automation and testing framework, Laravel Mix, Blade 'components' and 'slots', route model binding on broadcast channels, higher order messages for Collections, object-based Eloquent events, job-level 'retry' and 'timeout' settings. You only need to place items in the read and write arrays if you wish to override the values from the main array. You may use the make:migration Artisan command to generate a database migration. addObservableEvents (arraymixed observables) Add an observable event name. The rest of the database options for the read and write connections will be merged from the main mysql array. ![]() ![]() The read and write keys have array values containing a single key: host. Note that three keys have been added to the configuration array: read, write and sticky.
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