我目前在將值從數(shù)據(jù)庫中扣除到我的字段時遇到問題這是我的代碼在我的模型中，我有一個名為 deductpublic function deduct($id){        $data = array(            'loan' => $this->input->post('loan'),            'id' => $id,            'loan_type' => $this->input->post('loan_type'),            'loan_amount' => $this->input->post('loan_amount'),            'firstname' => $this->input->post('firstname'),            'lastname' => $this->input->post('lastname'),            'middlename' => $this->input->post('middlename'),            'gender' => $this->input->post('gender'),            'civilstatus' => $this->input->post('civilstatus'),            'birthday' => $this->input->post('birthday'),            'age' => $this->input->post('age'),            'dependents' => $this->input->post('dependents'),            'spousefirstname' => $this->input->post('spousefirstname'),            'spouselastname' => $this->input->post('spouselastname'),            'spousemiddlename' => $this->input->post('spousemiddlename'),            'spouseage' => $this->input->post('spouseage'),            'spousebirthday' => $this->input->post('spousebirthday'),            'homeaddress' => $this->input->post('homeaddress'),            'zipcode' => $this->input->post('zipcode'),            'lengthofstay' => $this->input->post('lengthofstay'),            'hometype' => $this->input->post('hometype'),        );    }