Setting response query correctly in Solr using AJAX

Inspired by an example of using Solr's JSON output for AJAX, I have incorporated a drop-down menu into my project form and introduced faceting to the parameters.

Parameters:

function getstandardargs() {
    var params = [
        'wt=json'
        ,'facet=true'
        ,'facet.field=brand1'
        ,'facet.field=brand2'
        ,'facet.field=brand3'
        ,'facet.field=brand4'
        ,'facet.limit=2'
        ]; 

Drop-down Menu:

<form name="f1" onsubmit='xmlhttpPost("/solr/select"); return false;'>
  <p>query: <input name="query" type="text">  
  <select id="Entity">
  <option value="brand1">Universal</option>
  <option value="brand2">Paramount</option>
  <option value="brand3">Fox</option>
  <option value="brand4">Sony</option>
</select> 
  <input value="Go" type="submit"></p>

Attempting to integrate the selected drop-down value into the facet query response:

var rsp = eval("("+str+")");
var c=document.getElementById("Entity");
cat=c.options[c.selectedIndex].value;
var output=rsp.facet_counts.facet_fields;
html += "Entity: " + output+'.'+cat;

After executing, the facet response displays: Entity: [object Object].Universal. How can I properly append the drop-down value to the query response so that Solr accurately returns the correct facet values? Appreciate any assistance in advance.

Answer №1

It is highly recommended to utilize a library for your ajax request in order to simplify the complexity of this problem, for the following reasons:

  • You can easily manipulate the DOM to convert them into select options
  • You can make the request arbitrarily and expect to receive an actual JSON object in return
  • Avoid using eval

Regarding your statement about the response being "Entity: [object Object].Universal", consider using console.log( output ); to accurately determine what is returned in the object. There is a possibility that concatenating strings with an object may be affecting the output.

If the response is indeed an object, you can access it iteratively as shown below:

for(var x in rsp.facet_counts.facet_fields) {
    //rsp.facet_counts.facet_fields[x]
}

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