xinecoulter / hogwartz

Hogwarts!

This repo includes seedfiles, creating an entity-relationship-diagram, using form_for and form_tag with drop downs and checkboxes referencing other models.

Takes aways

Seeds

You can prepopulate your database by adding code to your seeds.rb file. Just run $ rake db:seed

If you want to seed your database on heroku run $ heroku run rake db:seed

Relationships

$ rake erd will generate a PDF in your app directory of your models relationships.

Be sure to run $ brew install graphviz first.

forms and params

Creating a form by hand will result in a params like the following:

params = {name: "Harry Potter", age: 12, id: 1, action: 'create', controller: 'students'}

And in your controller

Student.new(name: params[:name], age: params[:age])

form_for can render an HTML form for a specific model. This means your params will contain a hash representing that object.

params = {student: { name: "Harry Potter", age: 12 }, id: 1, action: 'create', controller: 'students'}

And in your controller

Student.new(params[:student])

You can pass the entire student hash in to create a new object in your controller

forms with belongs_to and habtm

Check out the new student form for a select box drop down of houses. Check out the edit student page for check boxes of all the students spells.