Creates a callback to automatically create an url-friendly representation of the attribute argument. Example:
acts_as_url :title
will use the string contents of the title attribute to create the permalink. <strong>Note:</strong> you can also use a non-database-backed method to supply the string contents for the permalink. Just use that method’s name as the argument as you would an attribute.
The default attribute acts_as_url uses to save the permalink is url but this can be changed in the options hash. Available options are:
:adapter |
If specified, will indicate what ORM adapter to use. Default functionality is to use the first available adapter. This should work for most cases unless you are using multiple ORMs in a single project. |
:allow_slash |
If true, allows the generated url to contain slashes. Default is false. |
:allow_duplicates |
If true, allows duplicate urls instead of appending numbers to differentiate between urls. Default is false. See note on :scope. |
:duplicate_count_separator |
String to use when forcing unique urls from non-unique strings. Default is “-”. |
:force_downcase |
If false, allows generated url to contain uppercased letters. Default is false. |
:exclude_list |
List of complete strings that should not be transformed by acts_as_url. Default is empty. |
:only_when_blank |
If true, the url generation will only happen when :url_attribute is blank. Default is false (meaning url generation will happen always). |
:scope |
The name of model attribute to scope unique urls to. There is no default here. <strong>Note:</strong> this will automatically act as if :allow_duplicates is set to true. |
:sync_url |
If set to true, the url field will be updated when changes are made to the attribute it is based on. Default is false. |
:url_attribute |
The name of the attribute to use for storing the generated url string. Default is :url. |
:limit |
The maximum size a generated url should be. <strong>Note:</strong> this does not include the characters needed to enforce uniqueness on duplicate urls. Default is nil. |
# File lib/stringex/acts_as_url.rb, line 50 def acts_as_url(attribute, options = {}) class_eval do class << self attr_accessor :acts_as_url_configuration end define_method :acts_as_url_configuration do klass = self.class while klass.acts_as_url_configuration.nil? klass = klass.superclass end klass.acts_as_url_configuration end end options[:attribute_to_urlify] = attribute self.acts_as_url_configuration = Stringex::Configuration::ActsAsUrl.new(options) acts_as_url_configuration.adapter.create_callbacks! self end
Some ORMs function as mixins not base classes and need to have a hook to reinclude and re-extend ActsAsUrl methods
# File lib/stringex/acts_as_url.rb, line 74 def included(base = nil, &block) super if base base.send :include, Stringex::ActsAsUrl::ActsAsUrlInstanceMethods base.send :extend, Stringex::ActsAsUrl::ActsAsUrlClassMethods end end
Initialize the url fields for the records that need it. Designed for people who add acts_as_url support once there’s already development/production data they’d like to keep around.
Note: This method can get very expensive, very fast. If you’re planning on using this on a large selection, you will get much better results writing your own version with using pagination.
# File lib/stringex/acts_as_url.rb, line 90 def initialize_urls acts_as_url_configuration.adapter.initialize_urls! self end
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