Here, Group model will correspond to groups table (by default). Protected $table = 'group_list' // will point to group_list table if mentioned Eloquent will also assume that each table has a primary key column named “id” unless specified.
The lower-case, plural name of the class will be used as the table name unless another name is explicitly specified. All the model files should be in the app/models folder.Īll Eloquent models extend from the Eloquent class. Eloquent ORM provides Active Record implementation which means that each model we create in our MVC structure corresponds to a table in our database.Ĭreating an Eloquent model is similar to creating a class. In Laravel, each database table has a corresponding “Model”. It is similar to working with objects in PHP. The ORM included in Laravel is called Eloquent and it enables us to work with the database objects and relationships using an expressive syntax. ORM or Object Relational Mapper is a technique to access objects without having to consider how those objects are related to their source. So the array value when passed through the PDO connection gets sanitized. DB::select(DB::raw("SELECT * FROM `users` WHERE `name` = :username"), array('username' => $name))
#Eloquent laravel code
$name may contain malicious code therefore we need to alter the above code to make it SQL friendly. Using Query builder we can also write raw SQL queries DB::select(DB::raw(“SELECT * FROM `users` WHERE name = ‘$name’ ”))
If we look in to the Laravel’s database connection class for the select() method this array is wrapped around PDO connection and it is responsible to sanitize the data before the query is executed. He can be a valid user who enters proper values or someone trying to enter false values and crash your DB. As programmers we cannot trust what the user types into the input field. Let’s say that the values 10 and 20 are taken as user inputs. Why are we passing values as an array and not as comma separated parameters?Īt the start of this blog I did mention about SQL injection attacks. Laravel has the whereBetween(), whereNotBetween(), wherein() and whereNotIn() methods to which we can pass values as an array. Now we have a situation, we need to fetch all those users whose user_id falls between 10 and 20. Yes, we split up the operator and the operands as three parameters and feed it to the where conditions. So how do we fetch the list of users whose user_id is less than 10? $users = DB::table('users')->where(id, 'get() We often write queries against certain ‘where conditions’. Things get more interesting further down. Instead of returning the entire result array we can simply pluck out that specific column? $user_id = DB::table('users')->where('name', 'John')->pluck('id') įor specifying more than one column we can use the select clause $users = DB::table('users')->select('name', 'email')->get() What if we need only the user id of John. The first() method will only return the first find. Here, we are trying to fetch a row that has the value John in its name column. Similarly to fetch a single row we can modify the above code by adding a where clause $user = DB::table('users')->where('name', 'John')->first()
The table from which the value has to be selected is mentioned inside the brackets within quotes and finally the get() method gets the values. So, how do we create a simple select query to fetch all values from the users table?ĭB::table is responsible to begin a fluent query against a database table. We can avoid all those lines of code to sanitize the data before feeding it to the DB. The notable factor about query builder is that, since it uses the PHP Data Objects (PDO), we need not worry about SQL injection attacks (Make sure we don’t inadvertently remove this protection). and it works on all supported database systems like a champ. It can be used to perform all the database operations in your application, from basic DB Connection, CRUD, Aggregates, etc. In Laravel the database query builder provides an easy interface to create and run database queries.
Through this blog I intend to share few quick pointers on these concepts. A few tools that make Laravel an awesome framework is the inclusion of “Query Builder and Eloquent ORM”. An web application always needs to interact with a database and Laravel makes this task hassle free.
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