Detailed explanation of the use of laravel 5.4 orm method

Laravel is an open source PHP framework that provides a variety of tools and features to make it easier for developers to build high-quality web applications. Among them, ORM (Object Relational Mapping) is an important part of Laravel. ORM allows developers to map objects directly to database tables, thus simplifying the data access process. In Laravel 5.4, the ORM function has been further enhanced, providing more methods and functions. This article will introduce some of the commonly used ORM methods.

1. Data Query

Laravel 5.4 provides a rich query builder (Query Builder) method that can easily perform various types of data queries. For example, you can use the where() method to specify query conditions, the orderBy() method to specify the sorting method, the groupBy() method to specify the grouping method, and so on.

The syntax of the query builder method is as follows:

$query = DB::table('table_name');
$results = $query->select('column1', 'column2')
                 ->where('column3', '=', 'value')
                 ->orderBy('column4', 'desc')
                 ->get();

In the above code, the DB::table() method is used to specify the table name to be queried, and the select() method is used to specify the name of the table to be queried. field, the where() method is used to specify the query conditions, and the orderBy() method is used to specify the sorting method. Finally, use the get() method to obtain the query results.

2. Data Insertion

When inserting data using Laravel 5.4 ORM, you can directly insert data into the database without manually writing SQL statements. The method of inserting data is very simple, just call the insert() method and pass the data to be inserted.

The method syntax for inserting data is as follows:

DB::table('table_name')->insert(
    ['column1' => 'value1', 'column2' => 'value2']
);

In the above code, the DB::table() method is used to specify the table name to insert data, and the insert() method is used to insert data. Just pass the array of data to be inserted.

3. Data update

The method of updating data is similar to the method of inserting data. You need to specify the data to be updated and the update conditions. Laravel 5.4 ORM provides the update() method to update data, which is very convenient to use.

The method syntax for updating data is as follows:

DB::table('table_name')
    ->where('column1', 'value1')
    ->update(['column2' => 'value2']);

In the above code, the where() method is used to specify the update conditions, the update() method is used to update the data, and the data array to be updated is passed. Can.

4. Data deletion

The method of deleting data also requires specifying the data to be deleted and the deletion conditions. Laravel 5.4 ORM provides the delete() method to delete data, which is also very convenient to use.

The method syntax for deleting data is as follows:

DB::table('table_name')
    ->where('column1', 'value1')
    ->delete();

In the above code, the where() method is used to specify the deletion conditions, and the delete() method is used to delete data.

5. Data Record Count

In Laravel 5.4 ORM, you can use the count() method to count the number of data records. The count() method returns the number of records that meet the requirements under specified conditions.

The counting method syntax is as follows:

$count = DB::table('table_name')
             ->where('column1', 'value1')
             ->count();

In the above code, the count() method is used to calculate the number of data records and return the counting result.

6. Data batch operation

In Laravel 5.4 ORM, you can use the insert() and update() methods to perform batch operations. This means that multiple data records can be inserted or updated at the same time, thereby improving data operation efficiency.

The method syntax for batch operations is as follows:

DB::table('table_name')->insert([
    ['column1' => 'value1', 'column2' => 'value2'],
    ['column1' => 'value3', 'column2' => 'value4'],
    ['column1' => 'value5', 'column2' => 'value6'],
]);

DB::table('table_name')->where('column1', 'value1')
                        ->update(['column2' => 'new_value']);

In the above code, the insert() method and update() method are used to insert and update multiple data records in batches respectively. What is passed is an array containing multiple arrays. Each element in the array represents data for a record. When updating data, you need to use the where() method to specify update conditions.

Summary

Laravel 5.4 ORM provides a wealth of methods and functions to facilitate developers to operate data. This article introduces some commonly used ORM methods, including data query, data insertion, data update, data deletion, data record counting and data batch operations.

In practical applications, the appropriate ORM method can be selected according to specific business needs. Proficient in the use of Laravel 5.4 ORM can make it easier for developers to develop web applications.

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