CAML query contains does not work - sharepoint

Question

I've got this code, which takes a part of the title to perform a query and filter part of the content of a list:
<script type="text/javascript">
var items_lista;
SP.SOD.executeFunc('sp.js', 'SP.ClientContext', Initialize);
function Initialize() {
var PDP_Link_Filter = $("title").text().split("-")[1].split(".")[0];
PDP_Link_Filter = "Link_" + PDP_Link_Filter + "_";
var contexto = SP.ClientContext.get_current();
var web = contexto.get_web();
var listas = web.get_lists();
var parametros = listas.getByTitle('Parametrizacion_WF');
var query = new SP.CamlQuery();
query.set_viewXml("<Query><Where><Contains><FieldRef Name='Title'/>" +
"<Value Type='Text'>" + PDP_Link_Filter + "</Value></Contains></Where></Query>");
console.log(query);
items_lista = parametros.getItems(query);
contexto.load(items_lista);
contexto.executeQueryAsync(Function.createDelegate(this, this.onRequestSucceeded), Function.createDelegate(this, this.onRequestFailed));
} //Initialize
function onRequestSucceeded()
{
console.log(items_lista);
for(i = 0; i < items_lista.get_count(); i++)
{
console.log(items_lista.get_item(i).get_item('Title'));
}
}
function onRequestFailed() { console.log('Error'); }
</script>
The query filter that it generates (obtained through console.log()):
<Query><Where><Contains><FieldRef Name='Title'/><Value Type='Text'>P000</Value></Contains></Where></Query>
But when the for loop runs it shows all the content of the list not just the rows that match the filter.
What am I doing wrong?

Answer 1

This is most probably related with malformed value for SP.CamlQuery.viewXml property. Since this property expects XML schema that defines the list view, the root element has to be View element, for example:
var ctx = SP.ClientContext.get_current();
var list = ctx.get_web().get_lists().getByTitle(listTitle);
var items = list.getItems('<View Scope="RecursiveAll"><Query></Query></View>');
In your case enclose the query with View element:
<View>
<Query>...</Query>
</View>