- Construct a nested params hash with data about the primary object and a belongs to and has many association.
- Name form inputs correctly to create a nested params hash with belongs to and has many associated data.
- Define a conventional association writer for the primary model to properly instantiate associations based on the nested params association data.
- Define a custom association writer for the primary model to properly instantiate associations with custom logic (like unique by name) on the nested params association data.
- Use fields_for to generate the association fields.
The first data model we're going to be working with today is a recipe with ingredients.
- Recipe
- has many ingredients
- title:string
- Ingredient
- belongs to a recipe
- ingredient.name: string
- ingredient.quantity: string
The models and show routes and associations have been set up for you.
Build a recipe form that accepts two ingredients! It should automatically create the new Ingredient objects.
View Basic Nested Forms Lab on Learn.co and start learning to code for free.