Solr live search using ExtJs4 - json

Question

i'm using solr+haystack(django plugin) on the backend and the search is working fine;
While Django(and Haystack) with its templates is doing everything for me(I mean its pretty simple to configure and use), ExtJS4 is a little more complex;
The question is how to use Solr using ExtJS4?
An example is very much appreciated;
Thanks for any help and sorry for my English;

Answer 1

As ExtJS4 is a MVC framework, the solution is done like MVC;
The controller/Search.js
Ext.define('yourapp.controller.Search',{
extend:'Ext.app.Controller',
stores:[
'Searches'
],
views:[
'search.Search',
'search.SearchList'
],
models:[
'Search'
],
init:function(){
this.control({
"search":{
'keyup':this.search,
},
});
},
search:function(inputedTxt, e, eOpts){
this.getSearchesStore().load({
//When sending a request, q will rely to request.POST['q'] on server-side;
//inputedTxt.getValue() -- a value, entered in textfield (or whatever)
params:{
q:inputedTxt.getValue()
},
callback:function(result){
if(result[0]){
//do something with the result
//i'd been creating a window with a grid inside. "Grid"'s view is written below.
}
}
}
});
The models/Search.js
Ext.define('yourapp.model.Search',{
extend:'Ext.data.Model',
fields:[
{name:'name', type:'string'}
]
});
The store/Searches.js
Ext.define('yourapp.store.Searches',{
extend:'Ext.data.Store',
storeId: "searchStore",
model:'yourapp.model.Search',
autoLoad: false,
proxy:{
type:'ajax',
// server-side url
url: '/searchlist/',
actionMethods:{create: "POST", read: "POST", update: "POST", destroy: "POST"},
reader:{
type:'json',
root:'searches'
}
}
});
The view/search/Search.js
//a Text field to input text;
Ext.define('yourapp.view.search.Search',{
extend:'Ext.form.field.Text',
alias: 'widget.search',
id: "searchView",
enableKeyEvents: true,
initComponent:function(){
this.callParent(arguments);
}
});
The view/search/SearchList.js
//a view for a result
Ext.define('yourapp.view.search.SearchList',{
extend: 'Ext.grid.Panel',
alias:'widget.searchlist',
title: 'search result',
store: 'Searches',
columns:[
{
header:'Name',
dataIndex:'name',
flex:1
}
]
});
Somewhere in the view/Viewport.js xtype: 'search', should be inserted for a text field to be displayed.
That's all for a ExtJS4 part.
On server-side -- Django:
'haystack' and Solr should be installed and configured (by 'configured' i mean: search should already work on the server-side);
In someapp/view.py
def searchlist(request):
from haystack.query import SearchQuerySet
# POST["q"] should be receivedt from our client-side
searchText = request.POST["q"]
sqs = SearchQuerySet().filter(name=searchText)
data = []
for result in sqs:
data.append({"name": result.object.name})
return HttpResponse('{ success:true, searches:'+simplejson.dumps(data)+'}', mimetype = 'application/json')
Finally in your urls.py you should add:
(r'^searchlist/','someapp.views.searchlist'),
That was for it. Best wishes.
P.S.
I know this is not the greatest answer and there's lack of explanation, but as for me, I rather prefer a code example than verbal explanation.

Answer 2

SOLR has JSON output from its queries using wt=json param and can readily be consumed by ExtJS.
http://wiki.apache.org/solr/SolJSON?action=fullsearch&context=180&value=jsonp&titlesearch=Titles#JSON_Response_Writer
if you need to use jsonp you can specify a callback function via this param json.wrf=callback