There are mainly two approaches to getting data from the database in Symfony. The first is to use the Doctrine approach and the second is to use the DQL approach.
Doctrine is the most well-known library database associated with Symfony and mostly helps to obtain data from databases. It is a PHP tool. There are some other tools associated with Symfony, that help in the same. These are mostly databases such as – MySQL, NoSQL, PostgreSQL, and MongoDB. By now you just have understood that the primary process to Fetch data in Symfony.
Obtaining Data in Symfony
Here are the steps to follow to obtain data
Step 1: Install Doctrine: To be able to use Doctrine for fetching data in Symfony, one has to first install doctrine on the system. You need to use the Symfony pack for this task. Otherwise, you can also use the Maker Bundle which will yield the same results.
Step2: Database Configuration: You have to connect to a database you be able to obtain the data. The variable for information storage is DATABASE_URL. Customization will be made under the. env development environment.
Once you have set up doctrine, you can create databases for your use under the name db_name.
On the Symfony platform, you can easily access important data through objects. SQL is a relational model that is used to make this task easier. SQL can also be used to retrieve or alter the data and object models. On Symfony, you can use the following Retrieval functions for better access to the data.
- Retrieve Column Value – The individual base objects created for each column are called the schema. With specific functions and commands, you can retrieve all the column values in a systematic order. Use the Array function to deal with multiple values simultaneously.
- Retrieve Related Records: Users can translate the relationship between generated classes following an object-oriented pattern to retrieve any related records.
- Saving and Deleting Data: You can also create new objects and also relate them to the old ones. Usually, the ORM detects relationships between the new and the existing objects and saves them accordingly. The primary key is responsible for saving. You can always check whether an object is new or not through the isNew() tag.
Final Words
Symfony has got plenty of built-in features and useful tools that can be deployed to obtain data from databases in Symfony.
