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POCreating relationships between items in a Knockout.js model
 

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  1. POCreating relationships between items in a Knockout.js model
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    <p><strong>jsFiddle</strong>: <a href="http://jsfiddle.net/brandondurham/g3exx/" rel="nofollow">http://jsfiddle.net/brandondurham/g3exx/</a></p> <p><strong>How can I create relationships between various observableArrays in my model?</strong> For instance, in my model I have a <code>cartItems</code> array, and each item in that array has a nested <code>itemFreebies</code> array as well as an <code>itemType</code> property. Customers only get free items when they have a subscription in their cart (<code>"itemType" : "subscription"</code>) and, as such, when that subscription is removed I need to remove all other cart items' freebies, preferably with a nice fadeOut animation.</p> <p>What is the best way to create these types of conditional relationships?</p> <p>This is the object I'm using in my model:</p> <pre><code>{ "cartItems" : [ { "itemName" : "Product 1", "itemDesc" : "Product 1 description", "itemType" : "subscription", "itemPrice" : 299, "itemFreebies" : false }, { "itemName" : "Product 2", "itemDesc" : "Product 2 description", "itemType" : "desktop", "itemPrice" : 4499, "itemFreebies" : [{ "freebieName" : "Product 2 freebie", "freebieDesc" : "Product 2 freebie description", "freebieOriginalPrice" : 99 }] }, { "itemName" : "Product 3", "itemDesc" : "Product 3 description", "itemType" : "desktop", "itemPrice" : 8999, "itemFreebies" : [{ "freebieName" : "Product 3 freebie", "freebieDesc" : "Product 3 freebie description", "freebieOriginalPrice" : 99 }] }, { "itemName" : "Product 4", "itemDesc" : "Product 4 description", "itemType" : "desktop", "itemPrice" : 99, "itemFreebies" : [{ "freebieName" : "Product 4 freebie", "freebieDesc" : "Product 4 freebie description", "freebieOriginalPrice" : 99 }] }, { "itemName" : "Product 5", "itemDesc" : "Product 5 description", "itemType" : "webfont", "itemPrice" : 49, "itemFreebies" : false } ] } </code></pre>
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