MySQL error 1271 illegal mix

[MavisS2]

Hi,

I created module to GO and I have a problem with search bar. When I try search on polish char (ł,ę,ą), then gets this error "SQLSTATE[HY000]: General error: 1271 Illegal mix of collations for operation 'like'"

My code search tool:

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config.tbar = new Ext.Toolbar({
        items: [
            GO.lang.strSearch + ':',
            new GO.form.SearchField({
                store: config.store,
                width:320
            })
        ]
    })

and my code where i add to criteria my query string with polish char

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$query = $params['query'];
            $storeParamsUsers = new GO_Base_Db_FindParams();
            $storeParamsUsers->getCriteria()->addSearchCondition('first_name', $query, false, false, true);
            $storeParamsUsers->getCriteria()->addSearchCondition('last_name', $query, false, false, true);
            $storeParamsUsers->select("id");
            $storeUsers = GO_Timework_Model_User::model()->find($storeParamsUsers);

Someone can help me? I don't know why this hapend.

@Edited

Ok, I know why this hapend. When I use actionStore from GO_Base_Controller_AbstractModelController my field date (type timestamp) is use to search on query and this call error.

My new question is how excluded my date field from search?

@Edited2

Ok i'm find solution. In override function beforeStoreStatement in Controller i must call

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$storeParams->searchFields(array('title', 'description'));

Then search only in this fields.

I don't delete post, because someone need this