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POacts_as_tree and propogating a value through sub headers to items
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  1. POacts_as_tree and propogating a value through sub headers to items
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    copied!<p>I have a little bit of a complex model and want to get the full functionality capable with my limited understanding of rails. </p> <p>I have a section, a header (which uses acts_as_tree), and an item. </p> <p>I use json to bring sets of data in. This has worked very well. I would like to be able to bring attributes in for whole sets of data such as 'is_shippable'. I would like to be able to specify anywhere in the tree the is_shippable value and set to true. Also, I would like to be able to override at the header or item level to set it to false. </p> <p>I have decided that it makes sense to have is_shippable as an attribute on the section, header, and item and try to use a before_create callback to determine whether it should be is_shippable.</p> <p>For example: </p> <pre><code>section header -acts_as_tree item - is_shippable </code></pre> <p>sample json: </p> <pre><code>{ "name":"sample section", "is_shippable": true, "headers_attributes":[ { "name":"sample_section" "items_attributes":[{ "name":"sample item", "is_shippable":false, } ] } ] </code></pre> <p>} </p> <p>in header.rb </p> <pre><code>before_save :default_values private def default_values self.is_shippable ||=self.section.is_shippable # need to be able to set header to is_shippable=false if specified explicitly at that level end </code></pre> <p>in item.rb </p> <pre><code>before_save :default_values private def default_values # if not set, default to 0 self.is_shippable ||= 0 self.is_shippable=1 if self.header.is_shippable==true # need to be able to set item to is_shippable=false if specified explicitly at that level end </code></pre> <p>Is there a better way to do this than I am doing? How would I execute in if statements checking if is_shippable is set to false if it has been set to true higher in the hieararchy?</p> <p>thx</p> <p>EDIT - also there are more features that is_shippable like is_fragile, is_custom_size etc...</p>
 

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