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ActionController::InvalidAuthenticityToken

...le Entity) was returned to the user. The solution for Rails 3: Add: skip_before_filter :verify_authenticity_token or as "sagivo" pointed out in Rails 4 add: skip_before_action :verify_authenticity_token On pages which do caching. As @toobulkeh commented this is not a vulnerability on ...
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Difference Between One-to-Many, Many-to-One and Many-to-Many?

...ate is the one side and City is the many side. There will be a column state_id in the table cities. In unidirectional, Person class will have List<Skill> skills but Skill will not have Person person. In bidirectional, both properties are added and it allows you to access a Person given a ski...
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How to store arbitrary data for some HTML tags

...every possible browser is to use open classes like this: <a class='data\_articleid\_5' href="link/for/non-js-users.html>; This is not all that elegant to the purists, but it's universally supported, standard-compliant, and very easy to manipulate. It really seems like the best possible metho...
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What are paramorphisms?

...sibly simpler still is safeTail :: [x] -> Maybe [x] safeTail = para (\ _ xs _ -> Just xs) Nothing in which the "cons" branch ignores its recursively computed argument and just gives back the tail. Evaluated lazily, the recursive computation never happens and the tail is extracted in constan...
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typeof !== “undefined” vs. != null

...gument, or as a global variable), I think the best way to do it is: if (my_variable === undefined) jQuery does it, so it's good enough for me :-) Otherwise, you'll have to use typeof to avoid a ReferenceError. If you expect undefined to be redefined, you could wrap your code like this: (functi...
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ViewBag, ViewData and TempData

...mple, I set a ViewBag.Title property on all my Views which gets used in my _Layout.cshtml base view file. Another case where I use it is giving info-messages (e.g. "Product saved successfully!") to the users. I placed some generic markup in Layout.cshtml to render a message if provided and this allo...
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How to create “No Activate” form in Firemonkey

...form.Caption)); if hWin <> 0 then SetWindowLong(hWin, GWL_EXSTYLE, GetWindowLong(hWin, GWL_EXSTYLE) or WS_EX_NOACTIVATE); end; {$ENDIF} destructor TNoActivateForm.Destroy; {$IFDEF POSIX} begin panel.release; end; {$ELSE} begin end; {$ENDIF} procedure TNoActivateFo...
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Eclipse Workspaces: What for and why?

...and group the projects' sub-projects inside of it: /projects/proj1/subproj1_1 /projects/proj1/subproj1_2 /projects/proj2/subproj2_1 Create a separate folder for your workspaces: /eclipse-workspaces Create workspaces for your projects: /eclipse-workspaces/proj1 /eclipse-workspaces/proj2 ...
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Managing CSS Explosion

... and grouping related classes as closely as possible. div.content ul.table_of_contents div.content ul.table_of_contents li div.content ul.table_of_contents li h1 div.content ul.table_of_contents li h2 div.content ul.table_of_contents li span.pagenumber Think of the whole CSS structure as a tree...
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Sorting object property by values

... _.pairs turns an object into [ [key1, value1], [key2, value2] ]. Then call sort on that. Then call _.object on it to turn it back. – Funkodebat Feb 20 '14 at 14:45 ...