Rails%203%20In%20Action

Deleting a tag
This error is coming from ticket_steps.rb, line 10. Lines 8–11 of this file look like this:
table.hashes.each do |attributes|
attributes.merge!(:user => User.find_by_email!(email))
@project.tickets.create!(attributes)
end
The error is happening because the tags key in the ticket hash wants to pretend it’s
a field like the other keys. In this case, it’s assuming that you’re assigning a collection
of tag objects to this new ticket, and is therefore trying to iterate over each of them so
that it can generate the join between this ticket and those tags. Because you’re passing
it a string, it’s not going to work!
You should extract this column out of this hash and use the tag! method to assign
the tags, rather than attempting to create them through create!. You can modify
these four lines now to look like this:
table.hashes.each do |attributes|
tags = attributes.delete("tags")
attributes.merge!(:user => User.find_by_email!(email))
ticket = @project.tickets.create!(attributes)
ticket.tag!(tags) if tags
end
On the first line of your iteration, you use the same delete method that you’ve used a
couple of times previously. This method removes the key from a hash and returns the
value of that key, which you assign to the tags variable. On the final line of the iteration,
call the familiar tag! method and pass in tags, thereby tagging your ticket with
the passed-in tags. You use if tags because otherwise it would attempt to pass in a
nil object, resulting in the nil.split error you saw earlier.
When you re-run your feature using bin/cucumber features/deleting_tags
.feature, it gets to the guts of your scenario and tells you that it can’t find the delete
link you’re looking for:
When I follow "delete-this-tag-must-die"
no link with title, id or text 'delete-this_tag_must_die'
Alright, time to implement this bad boy.
11.4.2 Adding a link to delete the tag
You need a link with the id of delete-this-tag-must-die, which is the word delete,
followed by a hyphen and then the parameterize’d version of the tag’s name. This
link needs to trigger an asynchronous request to an action that would remove a tag
from a ticket. The perfect name for an action like this, if you were to put it in the
TicketsController, would be remove_tag. But because it’s acting on a tag, a better
place for this action would be inside a new controller called TagsController.
Before you go and define this action, let’s define the link that your scenario is looking
for first. This link goes into the tag partial at app/views/tags/_tag.html.erb inside
the span tag:
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