we try to save all generated pdf Reports by deriving from report Class and overwriting get_pdf:

class ReportDerived(models.Model):
    _inherit = 'report'    
    @api.v7        
    def get_pdf(self, cr, uid, ids, report_name, html=None, data=None, context=None):
        return super(ReportDerived, self).get_pdf(cr, uid, ids, report_name, html, data, context)

Model for storing:

class x_report_storage(models.TransientModel):
    _name = "x_report.storage"        
    _description = "Storage of Reports"	        
    model = fields.Text(string='Model:', required=False)	        
    ids = fields.Text(string='IDs:', required=False)        
    filename = fields.Text(string='Filename:', required=False)

now we tried within the get_pdf Method different ways to store the data:

vals = {'model': 'test',            
       'filename': 'testfname',            
        'ids': 'testIDS',}        
self.env['x_report.storage'].create(vals)

or

ql = ('insert into x_report_storage(ids) values("aaa")')        
self.env.cr.execute(sql)

But both versions do not work.

We do not get any odoo-log entries. Odoo stops at this lines without any special response.

Please give some hints whats wrong.