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Run a callback only if an attribute has changed in Rails
...:Dirty is here: https://github.com/rails/rails/commit/16ae3db5a5c6a08383b974ae6c96faac5b4a3c81
Here is a blog post on these changes: https://www.ombulabs.com/blog/rails/upgrades/active-record-5-1-api-changes.html
Here is the summary I made for myself on the changes to ActiveRecord::Dirty in Rails ...
How do I get the function name inside a function in PHP?
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What does “@@ -1 +1 @@” mean in Git's diff output?
...ile-modification-time
The time stamp looks like 2002-02-21 23:30:39.942229878 -0800 to indicate the date, time with fractional seconds, and time zone. The fractional seconds are omitted on hosts that do not support fractional time stamps.
You can change the header's content with the --lab...
Difference between git pull and git pull --rebase
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edited May 23 '17 at 11:47
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answered Sep 21 '13 at 8:28
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How does “304 Not Modified” work exactly?
... If-Modified-Since or If-None-Match header, telling the server to send a 304 if the content still has that date or ETag.
The server needs some way of calculating a date-modified or ETag for each version of each resource; this typically comes from the filesystem or a separate database column.
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Appending to an existing string
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answered Mar 1 '10 at 15:44
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