🗃️ Elixir Ecto Database Interaction-Elixir Database Expertise

Example

Defining a User schema module with Ecto.Schema to map to a users table, including fields like name and email.

Scenario

When setting up a new application, you define schemas to mirror your database structure in your Elixir code. This allows you to interact with your database tables as if they were Elixir structs, providing a seamless integration between your database and application logic.

Example

Using Ecto.Changeset to define validations and constraints on a User schema, such as validating the format of an email address.

Scenario

Before inserting or updating records in the database, you need to ensure the data is valid. Ecto changesets allow you to define validations and constraints that your data must meet, helping prevent invalid data from entering your database.

Example

Using Ecto.Repo to insert, update, delete, and query records using Ecto's query DSL.

Scenario

In everyday application development, you need to perform create, read, update, and delete operations on your database. Ecto simplifies these operations, allowing you to write them in Elixir code using its Repo module, making your codebase more consistent and easier to maintain.

Example

Creating and running migrations with mix ecto.gen.migration and mix ecto.migrate to alter the database schema, such as adding a new table or modifying an existing one.

Scenario

As your application evolves, so does your database schema. Ecto provides a powerful migration system that lets you version-control your database schema changes, ensuring smooth transitions and updates to your database structure over time.