Singletons are evil, and here's why.
Fair enough. Yet they exist, and they're not intrinsically evil--just misused. Can we mock enough to make testing them feasible? Yep, and here's a Contrived Example™ that shows how (and why we might want to).
"Embedded" singletons or utility classes can make testing is problematic. Injected singletons are different; then it's an issue of whether or not it
on Thursday, November 10, 2011
(Because it's like "racetrack", and it makes Rake tasks faster, and... oh, never mind.)
Tired of waiting for Ruby to spin up just so you can run a "routes" command, or your latest "db:migrate"?
Use rake-sh and start up a rake console for running tasks without the initial spin up. It'll take a "rake routes" from four seconds down to under a second. Rake task completion? Naturally. Use "t" for
Tired of waiting for Ruby to spin up just so you can run a "routes" command, or your latest "db:migrate"?
Use rake-sh and start up a rake console for running tasks without the initial spin up. It'll take a "rake routes" from four seconds down to under a second. Rake task completion? Naturally. Use "t" for
on Thursday, September 15, 2011
Remember when I had a Rails 3 custom validator quandary? My bottom-line question was "how should I access a specific error condition, cleanly, in both an action, and a template?" I sketched a few solutions, ranging from checking for a specific error message to providing a function that indicates if the error has occurred.
For now, I want simple boolean methods on the model to encapsulate the
For now, I want simple boolean methods on the model to encapsulate the
on Tuesday, September 6, 2011
Entry-level overview of one way to add trivial Ajax functionality to a Rails 3.0 app, originally written for a specific audience. The repository is on github.
Let's say we have an Article model with an "approved" flag. We need to be able to toggle this flag. Normal scaffolding would have us view the article, click a checkbox, and submit. We'll keep that functionality, but add a simple
Let's say we have an Article model with an "approved" flag. We need to be able to toggle this flag. Normal scaffolding would have us view the article, click a checkbox, and submit. We'll keep that functionality, but add a simple
on Monday, September 5, 2011
This question on stackoverflow led me to believe that if I actually ran rake test that my example app's tests would fail--and they did, with the same error. (Why I wasn't running tests from the beginning? Meh!) The tests throw up wads of stack trace, headed with this:
SQLException: no such table: user_sessions: DELETE FROM "user_sessions" WHERE 1=1
What's causing this error? We created our user
SQLException: no such table: user_sessions: DELETE FROM "user_sessions" WHERE 1=1
What's causing this error? We created our user
I'm prototyping some calendar/date stuff for a Rails app in standalone scripts, and want access to both normal Rails things (in this case, ActiveSupport's date math, like Date.today - 3.days) and my own classes within the prototyping directory. I'd like to continue using TextMate's "Run" command to run the current buffer as a Ruby script, since it's convenient. I'm using rvm; my prototyping
This is a continuation of my first authlogic/Rails 3 post.
Authlogic users have both "login" and "email" properties by default. I wanted to allow users to log in via their email address or nickname. I tackled this in two steps. First, switch to logging in using the "email" property. Second, create a "nickname" property, and allow users to log in with either one. (Yes, I actually wanted to call
on Sunday, September 4, 2011
I've started a simple Rails 3 + authlogic example project on github, mostly for myself to experiment with. Right now it's basically a copy of this post's implementation (and unfinished at that), but I'll be expanding it over the next few days in various ways.
As it stands, the "application" (I use the term loosely) consists of a home page (root path) requiring login, and login/logout actions.
As it stands, the "application" (I use the term loosely) consists of a home page (root path) requiring login, and login/logout actions.
on Sunday, August 28, 2011
(Not checkboxes, in my case, but a checkbox example is easy, and more common.)
Originally I thought I needed accepts_nested_attributes_for, but that seems to be mostly for when we're creating the related objects, which I'm not--I need to save relationships to existing objects.
My example (github) uses a simple product/category relationship. We need to get a product's categories, we need to get
Originally I thought I needed accepts_nested_attributes_for, but that seems to be mostly for when we're creating the related objects, which I'm not--I need to save relationships to existing objects.
My example (github) uses a simple product/category relationship. We need to get a product's categories, we need to get
on Monday, August 22, 2011
Throwing this out there to see what people thing--I suspect there are better, cleaner ways to do this, and I'm wondering what they are.
$.fn.click1 = function(fn) {
$(this).data('clicked', false);
$(this).click(function(o) {
if ($(this).data('clicked')) return false;
$(this).data('clicked', true);
fn(o);
return false;
});
};
(I return false because I know I don't
$.fn.click1 = function(fn) {
$(this).data('clicked', false);
$(this).click(function(o) {
if ($(this).data('clicked')) return false;
$(this).data('clicked', true);
fn(o);
return false;
});
};
(I return false because I know I don't
on Tuesday, August 9, 2011
I'm trying to figure out the "best" way to support discovery of custom validator errors on a Rails 3 model.
My model has both standard and custom validators. I need to check for validation errors from the custom validators, in both controller and template.
My slap-dash solution was to add an additional error message keyed to the field name suffixed with a validator-specific extension. For
My model has both standard and custom validators. I need to check for validation errors from the custom validators, in both controller and template.
My slap-dash solution was to add an additional error message keyed to the field name suffixed with a validator-specific extension. For
on Monday, August 8, 2011
I push the command line on people, because it's generally the most efficient way to do several different things. My devs resist me, although I don't understand why... part of it is that most places I've worked at are Windows houses. No problem, say I: Cygwin to the rescue. Seriously, gang, I'm not just making this up.
(I'll grant, however, that there are some Finder/Explorer replacements that
(I'll grant, however, that there are some Finder/Explorer replacements that
on Friday, August 5, 2011
Two FB apps, both using FB.ui to publish to a stream. One worked, one didn't, nobody knew why. I needed to know.Nutshell: FB JS code was inadvertently included twice (not by me, which always makes things more difficult). This caused the app_id and app_key values in the FB.ui call to go away--everything else was there, but two pieces critical (obviously) weren't. Note that the app code didn't
on Friday, July 1, 2011
Several sites describe the process necessary to get TextMate to use either a wrapped (via the rvm wrapper command) or an rvm-specified default Ruby interpreter (including gemsets, basically anything you can use with the rvm use command).
Following just those steps never worked for me, even when I explicitly gave a wrapped TM_RUBY: it would still do an exec ruby in there and blow up. I've
on Sunday, January 30, 2011
Aww yeah; it's back, YouTubier than ever. (The audio conversion is a bit spikey--I'll have to try it again I think.)Watch it on YouTube!Myeeeeah update! Update! myeeeeeeeeeaaaaaaaaa Update! Implementing googling!For those keeping score at home... still haven't found anyone I actually *want* to hire, although there have been a few people that would have been solid workers, I really need someone
Subscribe to:
Comments (Atom)