CRUD in Sinatra -- Check for Understanding

cfu_crud_in_sinatra.markdown

1. Define CRUD.

• The acronym for the basic actions carried out in web applications: Create, Read, Update, Delete

2. There are seven verb + path combinations that are necessary in a basic Sinatra app in order to provide full CRUD functionality. List each of the seven combinations, and explain what each is for.

• Read / GET - Displaying the collection
• Read / GET - Displaying an item
• Create / GET - Displaying the form for creating an item
• Create / POST - Submitting the info from that form for creation
• Update / GET - Displaying the form for changing an item
• Update / PUT - Submitting the info from that form for changing
• Delete / DELETE - Removing a designated item

3. Why do we use set method_override: true?

• HTTP doesn't actually know how to handle PUT or DELETE, so we need to override it's default behavior

4. Explain the difference between value and name in this line: <input type='text' name='task[title]' value="<%= @task.title %>"/>.

• Value is the title contents (In this example) of @task that are displayed in the form when the page is loaded
• Name is the value passed when the form is submitted

5. What are params? Where do they come from?

• params is the hash of string values passed via HTML post when a form is submitted

looks good