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POExtJS 4: Write nested XML with model associations
 

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  1. POExtJS 4: Write nested XML with model associations
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    <p>I'm trying to write nested XML data via model associations but I can't go ahead.</p> <p>First of all the XML:</p> <pre class="lang-xml prettyprint-override"><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;card&gt; &lt;generalData&gt; &lt;name&gt;A card&lt;/name&gt; &lt;description&gt;That's a description&lt;/description&gt; &lt;/generalData&gt; &lt;specificData&gt; &lt;number&gt;100&lt;/number&gt; &lt;type&gt;int&lt;/type&gt; &lt;/specificData&gt; &lt;otherStuff&gt; &lt;note&gt;Those notes...&lt;/note&gt; &lt;/otherStuff&gt; &lt;/card&gt; </code></pre> <p>Here's the code of models:</p> <pre class="lang-js prettyprint-override"><code>Ext.define ('generalData', { extend: 'Ext.data.Model' , fields: ['name', 'description'] }); Ext.define ('specificData', { extend: 'Ext.data.Model' , fields: ['number', 'type'] }); Ext.define ('otherStuff', { extend: 'Ext.data.Model' , fields: ['note'] }); Ext.define ('Card', { extend: 'Ext.data.Model' , requires: ['generalData', 'specificData', 'otherStuff'] , hasOne: [{ name: 'generalData' , model: 'generalData' , getterName: 'getGeneralData' , associationKey: 'generalData' , reader: { type: 'xml' , root: 'generalData' , record: 'generalData' } , writer: { type: 'xml' , documentRoot: 'generalData' , record: 'generalData' } } , { name: 'specificData' , model: 'specificData' , getterName: 'getSpecificData' , associationKey: 'specificData' , reader: { type: 'xml' , root: 'specificData' , record: 'specificData' } , writer: { type: 'xml' , documentRoot: 'specificData' , record: 'specificData' } } , { name: 'otherStuff' , model: 'otherStuff' , getterName: 'getOtherStuff' , associationKey: 'otherStuff' , reader: { type: 'xml' , root: 'otherStuff' , record: 'otherStuff' } , writer: { type: 'xml' , documentRoot: 'otherStuff' , record: 'otherStuff' } }] , proxy: { type: 'ajax' , url: '/card' , reader: { type: 'xml' , record: 'card' , root: 'card' } , writer: { type: 'xml' , documentRoot: 'card' , record: 'card' , header: '&lt;?xml version="1.0" encoding="utf-8"?&gt;' } } }); </code></pre> <p>As you can see, each model has his reader and writer (this last one is really needed?).</p> <p>Here I retrieve data and I try to send it back to the server.</p> <pre class="lang-js prettyprint-override"><code>Card.load (1, { success: function (card) { console.log (card); var gd = card.getGeneralData (function (data) { console.log (data.get ('name')); data.set ('name', 'Another card'); }); card.save (); } }); </code></pre> <p>When 'success' function is called, I've all the XML I requested and 'A card' is written on the console. Then, I try to change the name of the card in 'Another card' and send the data back with <em>card.save ()</em>. At this point, I got three kind of problems:</p> <p>1) The request paylod (data sent to the server) isn't the XML I got on the previous request. In fact, it has the following structure:</p> <pre class="lang-xml prettyprint-override"><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;card&gt; &lt;card&gt; &lt;id&gt;&lt;/id&gt; &lt;/card&gt; &lt;/card&gt; </code></pre> <p>I got this structure because of the writer: empty with two equal elements and a new element ('id') I didn't specify nowhere. So, the first question is: <strong>how can I add a single documentRoot or record element to the data I've to send?</strong></p> <p>2) The second point is: <strong>where's my data? Why the sent XML is empty? Am I doing right the model saving process?</strong></p> <p>3) And, in the end, the third problem: the <em>Content-Type</em> of the request is <strong>text/xml</strong>. So, <strong>how can I change it into application/xml?</strong></p> <p>Model associations are ok with reading but I can't really understand how they works with writing. <strong>What I want is just read the XML data, modify some fields and then send it back again, everything with the XML format.</strong></p>
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