CRUD in Sinatra -- Check for Understanding

cfu_crud_in_sinatra.markdown

1. Define CRUD.

• CRUD stands for "create, read, update, delete" and refers to the main functions for manipulating stored data

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.

3. GET /tasks - to read all tasks

4. GET /tasks/:id - to read one task

5. GET /tasks/new - to view form for creating new task

6. POST /tasks - to submit form for creating new task

7. GET /tasks/:id/edit - to view form for updating task

8. PUT /tasks/:id - to submit form for updating task

9. DELETE /tasks/:id - to delete a task

10. Why do we use set method_override: true?

• Typically browsers cannot handle DELETE and PUT requests therefore we need to use POST and override.

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

• 'name' creates identifier for which the input's 'value' will be stored and by which the input's 'value' will be referred.

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

• 'params' is a hash containing info (other than method and path) sent by a client to a server. In a GET request, they are part of the path. In a POST request, they are found in the body.