Learning Sinatra by Sudeep Agarwal & Manoj Sehrawat

Author:Sudeep Agarwal & Manoj Sehrawat [Agarwal, Sudeep]
Language: eng
Format: azw3
Publisher: Packt Publishing
Published: 2016-04-27T04:00:00+00:00

This block checks whether the currently logged in user can edit the permissions on the given list or not. If yes, it deletes all the old permissions and sets the new permissions. We will design our HTML form in such a way that it submits the list id and new permission (private, shared, or public) and an array of users with their permission levels (read_only or read_write) if the list is made shared. If the list is made private, the array of users will have the currently logged user and level as read_write.

Let's go through this code line by line:

Line 55: This gets the record of the currently logged in user.

Line 56: This gets the record of the list.

Line 57: This sets the value of the can_change_permission variable to true.

Lines 59-66: This checks whether the user has permissions to edit the list. If not, it changes the value of the can_change_permission variable to false.

This is the same as we did in the edit_list route.

Lines 68-87: If can_change_permission is true, it updates the list's permission value and deletes all the existing permissions. It also sets the permissions for all the users with the permission level as specified if the list is made private or shared. Otherwise, it shows the error page.

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