What Things We Can Define In The Model?

Here are some of the key things you can define in a Ruby on Rails model:

Database Columns

• You can define the columns that will be stored in the database table for your model. This includes specifying the column name, data type, and any constraints like null: false.

Validations

• You can define validations to ensure data integrity, such as presence, uniqueness, format, length, and numericality validations. For example:

validates :name, presence: true, length: { minimum: 3 }

Associations

• You can define relationships between models, such as has_many, belongs_to, has_one, and has_and_belongs_to_many associations. This allows you to easily access related data.

Callbacks

• You can define callback methods that will be called at certain lifecycle events, such as before/after creation, update, save, or deletion. This allows you to add custom logic.

Scopes

• You can define named scopes to encapsulate common queries, making your code more readable and reusable. For example:

scope :active, -...