CRUD in Sinatra -- Check for Understanding

cfu_crud_in_sinatra.markdown

1. Define CRUD. Four main functions a user can use to manipulate data: 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. Using the Task Manager example:
   1. "/tasks", GET: shows all tasks
   2. "/tasks/:id", GET: shows one task
   3. "/tasks/new", GET: shows form to create a new task
   4. "/tasks", POST: creates a new task
   5. "/tasks/:id/edit", GET: shows form to edit a task
   6. "/tasks/:id", PUT: submit form to update existing task
   7. "/tasks/:id", DELETE: deletes a task
3. Why do we use set method_override: true? To create put and delete methods
4. Explain the difference between value and name in this line: <input type='text' name='task[title]' value="<%= @task.title %>"/>. The value is what's put into the form, the name is a reference.
5. What are params? Where do they come from? params is a hash that contains each task as a key with a value of another hash that contains the task title and description. It comes from the create method in task_manager.rb

1. 👍 in other words, four database operations
2. 👍
3. to use PUT and DELETE because browsers only support GET and POST in forms
4. 👍 we can also use the name to reference the value from params: params[:name] will give us the value
5. params can come from form data, dynamic parameters in the URL, or query strings in the URL