Disqus - Latest Comments for xtine78

Re: Final Project: Tips for the Writeup and Features

xertroyt — Sat, 03 Jan 2009 12:14:38 -0000

There are a lot of things you could do:

-- Delete from the console. E.g., Thing.delete(1) # where 1 is the id of the Thing you want to delete. Remember the difference between delete and destroy from lecture -- destroy uses the callbacks, so if there are dependent objects, they will get deleted, too.

-- Play around with your app, then delete the development database (in db/development.sqlite3) then re-run your migrations. This is the cleanest way.

Re: Final Project: Tips for the Writeup and Features

xtine78 — Sat, 03 Jan 2009 12:04:33 -0000

Let's say I've entered in some data into my application that I would like to delete without using my application for debugging purposes. What's the best way to delete data I've entered from the database? The console?

Re: Screencasts

xtine78 — Thu, 01 Jan 2009 16:48:31 -0000

The flash messages are not showing up on either the standard or pages I've created. I have verified that the following is included in my code:

<% if flash[:notice] %>
<div id="notice"><%= flash[:notice] %></div>
<% end %>

[edit]

which is pointless if your div doesn't match and if you also haven't put in code for flash[:error]! NEVERMIND!

Re: Screencasts

xertroyt — Thu, 01 Jan 2009 10:38:46 -0000

Such as?

-- which message?
-- Are you trying to display it on a page you created, or one of the standard ones?

Re: Screencasts

xtine78 — Wed, 31 Dec 2008 23:14:33 -0000

Has anyone else had any problems with the flash messages using the restful authentication plugin?

Re: Assignment 3, Milestone III

xertroyt — Sat, 06 Dec 2008 12:33:40 -0000

Cool.

The short answer is that when you put [] after an attribute name, Rails will magically take each check and assign "true" to the array element for the check id.

It's totally non-obvious, which is why I discussed it in lecture, and recommended that people look at the ChildCare Co-Op code.

Re: Assignment 3, Milestone III

xtine78 — Sat, 06 Dec 2008 10:36:33 -0000

I do have it implemented and working (not exactly as written above of course). I will do some more research to make sure I understand how its working. In the end, its probably my update method that isn't handling the information correctly.

Thanks!

Re: Assignment 3, Milestone III

xertroyt — Sat, 06 Dec 2008 10:15:59 -0000

I discussed it at some length in one of the lectures, and said things like "you will need to understand this for Assignment 3."

The checkbox technique is also used in ChildCare Co-Op. Please review those materials.

Re: Assignment 3, Milestone III

xtine78 — Sat, 06 Dec 2008 09:57:09 -0000

<%= check_box_tag (:observation_ids[], "#{obs.id}") %>

How does this line work? :observation_ids[] isn't something I have seen in my code. Is this meant to gather the observation.id into an array? I gather that the obs.id will send the obs.id to the update method so that an observation can be deleted.

Re: Assignment 3, Milestone III

xertroyt — Fri, 05 Dec 2008 17:19:12 -0000

Good - you should review your code carefully, though, 'cos it sounds like you got some bad data in there.

Re: Assignment 3, Milestone III

xtine78 — Fri, 05 Dec 2008 17:05:41 -0000

I ran migrations back and its working better.

Re: Assignment 3, Milestone III

xertroyt — Fri, 05 Dec 2008 15:14:52 -0000

For all units? It may be that you added a unit with a null for the measurement . . . i.e., a bug in your code?

You should be able to do:

Unit.find(:all).each { |u| puts u.measurement.name }

I.e., iterate through all of your units, and see if any break on the following of the measurement association.

Re: Assignment 3, Milestone III

xtine78 — Fri, 05 Dec 2008 15:02:42 -0000

I got a result in the console. I wonder what I've done to break the relationship in my controller so that the this code doesn't execute in the view.

Re: Assignment 3, Milestone III

xertroyt — Fri, 05 Dec 2008 14:48:51 -0000

Could you double-check that from the console for a unit that we created in the original migrations? E.g.,

ruby script/console
Unit.find(:all).first.measurement.name

Re: Assignment 3, Milestone III

xtine78 — Fri, 05 Dec 2008 14:38:38 -0000

observation_kind and unit have the same relationship to measurements right?

For an observation kind I can say something like observation_kind.measurement.name because all the methods are made available to the observation_kind through the measurement relationship.

Should I also be able to use the same relationship with units? For example unit.measurement.name? When I do this from the unit's index view the measurement is nil.

Re: Assignment 2

xtine78 — Sun, 19 Oct 2008 17:58:45 -0000

I know! I can't call @hand.thismethod and have that method call @hand.method1! I just call method1. Thanks for looking!

Re: Assignment 2

xertroyt — Sun, 19 Oct 2008 17:39:24 -0000

What you have posted has this line:

@hand.method1()

Does @hand have a method called "method1" on it?

The error message (did you read it?) says: undefined method `method1' for []:Array

So it would seem that when @hand.method1() is executed, @hand is an Array, perhaps; is it? You can find out what class it is before this statement is run by adding:

puts @hand.class

John

Re: Assignment 2

xtine78 — Sun, 19 Oct 2008 17:01:30 -0000

Here is an error I cannot resolve.

The error is:
NoMethodError: undefined method `method1' for []:Array

I get the error when I run the case statement. Any idea what's happening?

def thismethod()
myvariable = case
when @hand.method1() == true
something
when @hand.method2() == true
something!
else
nothing
end
end