Errata for Agile Web Development with Rails, Third Edition
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in. This page lists the errors submitted by our astute readers.
If you've found a new error, please
submit it.
The latest version of the book is P5.0,
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128 |
#42272: the html code in _cart_item.html.erb doesn't work as written, there seems to be an open <tr> with no ending </tr>, and I cannot work out where to place the </tr>. --kacey #42272: the html code in _cart_item.html.erb doesn't work as written, there seems to be an open <tr> with no ending </tr>, and I cannot work out where ...more... |
P4.0
07-Feb-10
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128 |
#42282: Please remove previous erratum <tr>, typo with javascript defaults was causing the error.--kacey
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P4.0
08-Feb-10
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#42139: I realize that the Store application is designed to give someone unfamiliar with Rails a really quick tour of what an awesome app you can make in a short time. Nevertheless, I feel like the discussion on the foreign key sqlite3 "hack" is a bit....hand-wavey? I don't know a lot about sqlite3 or SQL in general, but it feels like the book skips over this pretty quickly.
When learning from a book i think "Hm, would i have thought to do that? Maybe with some Google-fu?" as a measure of "Did you _really_ get it." I don't think I would have come to putting these DDL calls in unless I had seen it in the book.
Maybe explain what's going on here? Or put it in a footnote? Or a Joe Asks? Or cover the theory in one of the later chapters about DB design?--Steven Harms #42139: I realize that the Store application is designed to give someone unfamiliar with Rails a really quick tour of what an awesome app you can make ...more... |
P4.0
22-Jan-10
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#42273: In the discussion of how to build a callback class and express it throughout all models, I think that a critical question is not addressed:
(1) how do we get this file "sourced" into the Rails runtime. If you put it in lib as a module does it automatically get loaded up? How can we get it to run as the environment boots up. The example source file is given as a stand-alone script.
(2) It appears that we're being encouraged to monkey-patch ActiveRecord::Base. While the ability to do this is one of the amazing joys of Ruby, it might be good to explain why this may or may not be a good idea. Many a tweet has gone out on the difficulty monkeypatching has introduced in code-sharing / debugging.--Steven Harms #42273: In the discussion of how to build a callback class and express it throughout all models, I think that a critical question is not addressed:
...more... |
P5.0
08-Feb-10
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Stuff To Be Considered in the Next Edition
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Paper |
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18 |
#41589: ERb is defined as "Embedded Ruby" on p. 18 but is not in the index, please add to index. P2.0 printing April 2009 Version: 2009-4-7, please add this printing to the selection dropdown for Errata as well, this is the paper version I have. Thanks.--M. Roxas #41589: ERb is defined as "Embedded Ruby" on p. 18 but is not in the index, please add to index. P2.0 printing April 2009 Version: 2009-4-7, please a ...more... |
P1.0
21-Nov-09
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114 |
#42012: To produce the sans-serif cart title shown in the "screen-shot", the css for .cart-title needs to be "font: bold 120% sans-serif;". ("120% bold" fails in both Safari 4.0.4 and Firefox 3.5.5)
I believe erratum notification #41977 is incorrect and should be removed - the item price is defined in cart_item.rb to be the product price times the quantity in the cart.--Allan Kinnaird #42012: To produce the sans-serif cart title shown in the "screen-shot", the css for .cart-title needs to be "font: bold 120% sans-serif;". ("120% bo ...more... |
P4.0
05-Jan-10
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#42022: For those who did the additional problem of linking using the book image. Here is the AJAX code to perform the same task as the new AJAX button:
<%= link_to_remote (image_tag(product.image_url), :url => { :action => 'add_to_cart',:method => :post, :id => product }) %>
Which is inserted between <div class="entry" and <h3><%= product.title %>--Andrew Szczepanski #42022: For those who did the additional problem of linking using the book image. Here is the AJAX code to perform the same task as the new AJAX butto ...more... |
P1.0
08-Jan-10
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#41917: As of the end of section 11.2 the admin_controller function is not working as intended in the case of erroneous logins.
Having a seperate terminal window to view messages I see the flow of login and password unhashed (is this a possible security hole?). Upon proper credentials, the user is sent to the /admin address. As intended. However upon improper credentials, the page is reloaded (intended) but the
flash.now[:notice] = "Invalid user/password combination"
is not kicking in.
I assumed that because of the lack of a views/layouts/admin.html.erb
file, this was occuring.
Upon creation of that file (a simple duplicate of users.html.erb - which in itself is raising a non-DRY issue)
the message appears.
I'm definitely a newbie. This is an interesting bug to leave lying around as an exercise (confirms learning).
But I'm also curious about the security hole and non-DRY issue at hand and resolving it.--Jerome Marchand #41917: As of the end of section 11.2 the admin_controller function is not working as intended in the case of erroneous logins.
Having a seperate t ...more... |
P4.0
26-Dec-09
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#41429: The i18n.t examples are leaving the colon out of the message, for example:
<%= form.label :name, I18n.t('checkout.name') + ":" %>
This should be consider bad i18n, since some languages may and do want to use different character for the colon, or leave it out altogether. It is also a sign for translators that it is used as a label.
--Niklas Laxström #41429: The i18n.t examples are leaving the colon out of the message, for example:
<%= form.label :name, I18n.t('checkout.name') + ":" %>
This sho ...more... |
P1.0
14-Nov-09
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#41924: On the use of UTF-8, HTML and Javascript...
Page 194, section 13.1 states:
"if you do this, just make sure that your editor is configured for UTF-8."
But then when dealing with the localisations for the checkout, the following is presented:
address: "Dirección"
pay_prompt: "Seleccione un m\xC3\xA9todo de pago"
which is a by-product of passing the values via javascript I suspect.
Presently, I literally have a situation where the i18n.rb file has the tilde-n inserted as such and renders (I saved it in UTF-8, no BOM encoding) . The es.yml file has a mix of HTML and hex characters (it does not take kindly to UTF-8 encoding). Three flavours for one objective; dispersive, if not un-DRYish.
This is a point for a someoneSays box to highlight some pitfalls. And maybe suggestions.
Above all, a language file in hexa is rather difficult to read, increases data entry problems, lengthens checking (what will the professional translator do? Upon creation is one thing, upon editing is another! [scent of bad coupling]) and gets moreso as its size increases. Needs to be avoided...--Jerome Marchand #41924: On the use of UTF-8, HTML and Javascript...
Page 194, section 13.1 states:
"if you do this, just make sure that your editor is configured f ...more... |
P4.0
26-Dec-09
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#41595: The instructions for creating the empty git repository assume git has been installed on the git server. But the reader was not told to install git. "$ git --bare init" will fail if git is not installed. This was found in p3.0, 2009-9-21 PDF.--Jamie Allen #41595: The instructions for creating the empty git repository assume git has been installed on the git server. But the reader was not told to instal ...more... |
P1.0
22-Nov-09
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