Elixir Engine

Examples

Elixir Database CRUD

Building a CRUD App

Elixir database CRUD with Ecto handles data operations.

Introduction to Ecto

Ecto is a database wrapper and query generator for Elixir. It provides a standard way to interact with databases and is an essential tool in the Elixir ecosystem. Ecto helps you define schemas, run queries, and manage database transactions effectively.

Setting Up Ecto

To get started with Ecto in your Elixir project, you need to add it to your dependencies. Open your mix.exs file and add Ecto and a database adapter to the list of dependencies:

After adding the dependencies, run mix deps.get to install them.

Creating a Schema

A schema in Ecto is a representation of a database table. To create a schema, use the mix ecto.gen.schema task. For example, let's create a schema for a simple User model:

This command generates a User module with fields for name and email. The generated schema file will be located in the lib directory and looks like this:

Performing CRUD Operations

Once you have your schema, you can perform CRUD operations. Below are examples of how to create, read, update, and delete records in the database.

Create

To insert a new record, use the Repo.insert/1 function:

Read

To retrieve data, use Repo.get/2 or Repo.all/1:

Update

To update a record, first retrieve it, change the fields, and then call Repo.update/1:

Delete

To delete a record, use the Repo.delete/1 function:

Conclusion

Using Ecto in Elixir projects enables effective database management through clear and concise CRUD operations. With Ecto, you can easily define schemas, perform queries, and handle transactions, making it an invaluable tool for developers working with databases in Elixir.

Examples

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