不唯一的表/别名:“ospos_people”

请帮助我解决以下问题。

发生数据库错误

错误号：1066

不唯一的表/别名："ospos_people"

SELECT first_name, last_name, invoice_number, amount_tendered, sale_time, 
DATE_FORMAT( sale_time, '%d-%m-%Y' ) AS sale_date, ospos_sales.sale_id AS 
sale_id, SUM(item_unit_price * quantity_purchased * (1 - discount_percent / 100)) 
AS amount_due FROM (ospos_sales) LEFT JOIN ospos_people ON ospos_people.person_id 
= ospos_sales.customer_id LEFT JOIN ospos_people ON ospos_people.person_id = 
ospos_sales.vehicle_id JOIN ospos_sales_items ON ospos_sales_items.sale_id = 
ospos_sales.sale_id LEFT JOIN (SELECT sale_id, SUM(payment_amount) AS 
amount_tendered FROM ospos_sales_payments WHERE payment_type <> 'Check' GROUP BY 
sale_id) AS payments ON payments.sale_id = ospos_sales.sale_id GROUP BY sale_id 
ORDER BY sale_time desc LIMIT 25

文件名：/home/../public_html/../型号/销售.php

型号 = 销售.php

<?php
class Sale extends CI_Model
{
    public function get_info($sale_id)
    {
        $this->db->select('first_name, last_name, email, comment, invoice_number, amount_tendered, ' .
                 'sale_time, employee_id, customer_id, vehicle_id, comments');
        $this->db->select("DATE_FORMAT( sale_time, '%d-%m-%Y' ) AS sale_date", FALSE);
        $this->db->select("sales.sale_id AS sale_id");
        $this->db->select("SUM(item_unit_price * quantity_purchased * (1 - discount_percent / 100)) AS amount_due");
        $this->db->from('sales');
        $this->db->join('people', 'people.person_id = sales.customer_id', 'left');
                $this->db->join('people', 'people.person_id = sales.vehicle_id', 'left');
        $this->db->join('sales_items', 'sales_items.sale_id = sales.sale_id');
        $this->db->join("(SELECT sale_id, SUM(payment_amount) AS amount_tendered " .
                " FROM " . $this->db->dbprefix('sales_payments') ." WHERE payment_type <> '" .
                $this->lang->line('sales_check') . "' GROUP BY sale_id) AS payments",
                "payments.sale_id = sales.sale_id", 'left');
        $this->db->where('sales.sale_id',$sale_id);
        $this->db->order_by('sale_time', 'desc');
        $this->db->group_by('sale_id');
        return $this->db->get();
    }
    function get_all($only_invoices = 0, $rows = 0, $limit_from = 0)
    {
        $this->db->select('first_name, last_name, invoice_number, amount_tendered, sale_time');
        $this->db->select("DATE_FORMAT( sale_time, '%d-%m-%Y' ) AS sale_date", FALSE);
        $this->db->select("sales.sale_id AS sale_id");  
        $this->db->select("SUM(item_unit_price * quantity_purchased * (1 - discount_percent / 100)) AS amount_due");
        $this->db->from('sales');
        $this->db->join('people', 'people.person_id = sales.customer_id', 'left');
                $this->db->join('people', 'people.person_id = sales.vehicle_id', 'left');
        $this->db->join('sales_items', 'sales_items.sale_id = sales.sale_id');
        $this->db->join("(SELECT sale_id, SUM(payment_amount) AS amount_tendered " .
                " FROM " . $this->db->dbprefix('sales_payments') ." WHERE payment_type <> '" . 
                $this->lang->line('sales_check') . "' GROUP BY sale_id) AS payments",
                "payments.sale_id = sales.sale_id", 'left');
        $this->db->order_by('sale_time', 'desc');
        $this->db->group_by('sale_id');
        if ($rows > 0) {
            $this->db->limit($rows, $limit_from);
        }
        if ($only_invoices != 0) {
            $this->db->where('invoice_number <> ', 'NULL');
        }
        return $this->db->get();
    }
    function search($search, $only_invoices = FALSE, $rows = 0, $limit_from = 0) 
    {
        $valid_receipt = $this->sale_lib->is_valid_receipt($search);
        $this->db->select('first_name, last_name, invoice_number, amount_tendered, sale_time');
        $this->db->select("DATE_FORMAT( sale_time, '%d-%m-%Y' ) AS sale_date", FALSE);
        $this->db->select("sales.sale_id AS sale_id");
        $this->db->select("SUM(item_unit_price * quantity_purchased * (1 - discount_percent / 100)) AS amount_due");
        $this->db->from('sales');
        $this->db->join('people', 'people.person_id = sales.customer_id', 'left');
                $this->db->join('people', 'people.person_id = sales.vehicle_id', 'left');
        $this->db->join('sales_items', 'sales_items.sale_id = sales.sale_id');
        $this->db->join("(SELECT sale_id, SUM(payment_amount) AS amount_tendered " .
                " FROM " . $this->db->dbprefix('sales_payments') ." WHERE payment_type <> '" . 
                $this->lang->line('sales_check') . "' GROUP BY sale_id) AS payments",
                "payments.sale_id = sales.sale_id", 'left');
        $this->db->group_by('sale_id');
        if (!empty($search)) {
            // if barcode scanned, explode and search for second term which will be the id
            if ($valid_receipt) {
                $pieces = explode(' ',$search);
                $this->db->where('sales.sale_id', $pieces[1]);
            } else {
                // open parentheses
                $this->db->where("( last_name LIKE '%" . $search . "%' OR ".
                        "first_name LIKE '%" . $search . "%' OR " .
                        "CONCAT( first_name,' ',last_name ) LIKE '%" . $search . "%')");
                // close parentheses
            }
        }
        if ($only_invoices != 0) {
            $this->db->where('invoice_number <> ', 'NULL');
        }
        $this->db->order_by('sale_time DESC');
        if ($rows > 0) {
            $this->db->limit($rows, $limit_from);
        }
        return $this->db->get();
    }
    function get_total_rows()
    {
        $this->db->from('sales');
        return $this->db->count_all_results();
    }
    function get_search_suggestions($search,$limit=25)
    {
        $suggestions = array();
        if (!$this->sale_lib->is_valid_receipt($search)) {
            $this->db->distinct();
            $this->db->select('first_name, last_name, invoice_number, sale_time');
            $this->db->select("DATE_FORMAT( sale_time, '%d-%m-%Y' ) AS sale_date", FALSE);
            $this->db->select("sales.sale_id AS sale_id");
            $this->db->from('sales');
            $this->db->join('people', 'people.person_id = sales.customer_id', 'left');
                        $this->db->join('people', 'people.person_id = sales.vehicle_id', 'left');
            $this->db->where("( last_name LIKE '%" . $search . "%' OR ".
                    "first_name LIKE '%" . $search . "%' OR " .
                    "CONCAT( first_name, last_name ))");
            $this->db->order_by('last_name', "asc");
            foreach($this->db->get()->result_array() as $result)
            {
                $suggestions[]=$result[ 'first_name' ].' '.$result[ 'last_name' ];
            }
        } else {
            $suggestions[]=$search;
        }
        return $suggestions;
    }
    function get_found_rows($search, $only_invoices = FALSE)
    {
        $valid_receipt = $this->sale_lib->is_valid_receipt($search);
        $this->db->from('sales');
        $this->db->join('sales_items', 'sales_items.sale_id = sales.sale_id');
        $this->db->join('people', 'people.person_id = sales.customer_id', 'left');
                $this->db->join('people', 'people.person_id = sales.vehicle_id', 'left');
        $this->db->group_by('sales.sale_id');
        if (!empty($search)) {
            // if barcode scanned, explode and search for second term which will be the id
            $pieces = explode(' ',$search);
            if ($valid_receipt && count($pieces) == 2) {
                $this->db->where('sales.sale_id', $pieces[1]);
            } else {
                // open parentheses
                $this->db->where("( last_name LIKE '%" . $search . "%' OR ".
                        "first_name LIKE '%" . $search . "%' OR " .
                        "CONCAT( first_name,' ',last_name ) LIKE '%" . $search . "%')");
                // close parentheses
            }
        }
        if ($only_invoices != 0) {
            $this->db->where('invoice_number <> ', 'NULL');
        }
        return $this->db->get()->num_rows();
    }
    function get_invoice_count()
    {
        $this->db->from('sales');
        $this->db->where('invoice_number is not null');
        return $this->db->count_all_results();
    }
    function get_sale_by_invoice_number($invoice_number)
    {
        $this->db->from('sales');
        $this->db->where('invoice_number', $invoice_number);
        return $this->db->get();
    }
    function get_invoice_number_for_year($year='', $start_from = 0) 
    {
        $year = $year == '' ? date('Y') : $year;
        $this->db->select("COUNT( 1 ) AS invoice_number_year", FALSE);
        $this->db->from('sales');
        $this->db->where("DATE_FORMAT(sale_time, '%Y' ) = ", $year, FALSE);
        $this->db->where("invoice_number IS NOT ", "NULL", FALSE);
        $result = $this->db->get()->row_array();
        return ($start_from + $result[ 'invoice_number_year']);
    }
    function exists($sale_id)
    {
        $this->db->from('sales');
        $this->db->where('sale_id',$sale_id);
        $query = $this->db->get();
        return ($query->num_rows()==1);
    }
    function update($sale_data, $sale_id)
    {
        $this->db->where('sale_id', $sale_id);
        $success = $this->db->update('sales',$sale_data);
        return $success;
    }
    function save ($items,$customer_id,$vehicle_id,$employee_id,$comment,$invoice_number,$payments,$sale_id=false)
    {
        if(count($items)==0)
            return -1;
        $sales_data = array(
            'sale_time' => date('Y-m-d H:i:s'),
            'customer_id'=> $this->Customer->exists($customer_id) ? $customer_id : null,
                        'vehicle_id'=> $this->Vehicle->exists($vehicle_id) ? $vehicle_id : null,
            'employee_id'=>$employee_id,
            'comment'=>$comment,
            'invoice_number'=>$invoice_number
        );
        //Run these queries as a transaction, we want to make sure we do all or nothing
        $this->db->trans_start();
        $this->db->insert('sales',$sales_data);
        $sale_id = $this->db->insert_id();
        foreach($payments as $payment_id=>$payment)
        {
            if ( substr( $payment['payment_type'], 0, strlen( $this->lang->line('sales_giftcard') ) ) == $this->lang->line('sales_giftcard') )
            {
                /* We have a gift card and we have to deduct the used value from the total value of the card. */
                $splitpayment = explode( ':', $payment['payment_type'] );
                $cur_giftcard_value = $this->Giftcard->get_giftcard_value( $splitpayment[1] );
                $this->Giftcard->update_giftcard_value( $splitpayment[1], $cur_giftcard_value - $payment['payment_amount'] );
            }
            $sales_payments_data = array
            (
                'sale_id'=>$sale_id,
                'payment_type'=>$payment['payment_type'],
                'payment_amount'=>$payment['payment_amount']
            );
            $this->db->insert('sales_payments',$sales_payments_data);
        }
        foreach($items as $line=>$item)
        {
            $cur_item_info = $this->Item->get_info($item['item_id']);
            $sales_items_data = array
            (
                'sale_id'=>$sale_id,
                'item_id'=>$item['item_id'],
                'line'=>$item['line'],
                'description'=>$item['description'],
                'serialnumber'=>$item['serialnumber'],
                'quantity_purchased'=>$item['quantity'],
                'discount_percent'=>$item['discount'],
                'item_cost_price' => $cur_item_info->cost_price,
                'item_unit_price'=>$item['price'],
                'item_location'=>$item['item_location']
            );
            $this->db->insert('sales_items',$sales_items_data);
            //Update stock quantity
            $item_quantity = $this->Item_quantities->get_item_quantity($item['item_id'], $item['item_location']);       
            $this->Item_quantities->save(array('quantity'=>$item_quantity->quantity - $item['quantity'],
                                              'item_id'=>$item['item_id'],
                                              'location_id'=>$item['item_location']), $item['item_id'], $item['item_location']);

            //Ramel Inventory Tracking
            //Inventory Count Details
            $qty_buy = -$item['quantity'];
            $sale_remarks ='POS '.$sale_id;
            $inv_data = array
            (
                'trans_date'=>date('Y-m-d H:i:s'),
                'trans_items'=>$item['item_id'],
                'trans_user'=>$employee_id,
                'trans_location'=>$item['item_location'],
                'trans_comment'=>$sale_remarks,
                'trans_inventory'=>$qty_buy
            );
            $this->Inventory->insert($inv_data);
            //------------------------------------Ramel
            $customer = $this->Customer->get_info($customer_id);
            if ($customer_id == -1 or $customer->taxable)
            {
                foreach($this->Item_taxes->get_info($item['item_id']) as $row)
                {
                    $this->db->insert('sales_items_taxes', array(
                        'sale_id'   =>$sale_id,
                        'item_id'   =>$item['item_id'],
                        'line'      =>$item['line'],
                        'name'      =>$row['name'],
                        'percent'   =>$row['percent']
                    ));
                }
            }

                        //------------------------------------Vehi-ras
            $vehicle = $this->Vehicle->get_info($vehicle_id);
            if ($vehicle_id == -1 or $vehicle->taxable)
            {
                foreach($this->Item_taxes->get_info($item['item_id']) as $row)
                {
                    $this->db->insert('sales_items_taxes', array(
                        'sale_id'   =>$sale_id,
                        'item_id'   =>$item['item_id'],
                        'line'      =>$item['line'],
                        'name'      =>$row['name'],
                        'percent'   =>$row['percent']
                    ));
                }
            }
        }
        $this->db->trans_complete();
        if ($this->db->trans_status() === FALSE)
        {
            return -1;
        }
        return $sale_id;
    }
    function delete_list($sale_ids, $employee_id,$update_inventory=TRUE) 
    {
        $result = TRUE;
        foreach($sale_ids as $sale_id) {
            $result &= $this->delete($sale_id, $employee_id, $update_inventory);
        }
        return $result;
    }
    function delete($sale_id,$employee_id,$update_inventory=TRUE) 
    {
        // start a transaction to assure data integrity
        $this->db->trans_start();
        // first delete all payments
        $this->db->delete('sales_payments', array('sale_id' => $sale_id));
        // then delete all taxes on items
        $this->db->delete('sales_items_taxes', array('sale_id' => $sale_id));
        if ($update_inventory) {
            // defect, not all item deletions will be undone??
            // get array with all the items involved in the sale to update the inventory tracking
            $items = $this->get_sale_items($sale_id)->result_array();
            foreach($items as $item) {
                // create query to update inventory tracking
                $inv_data = array
                (
                    'trans_date'=>date('Y-m-d H:i:s'),
                    'trans_items'=>$item['item_id'],
                    'trans_user'=>$employee_id,
                    'trans_comment'=>'Deleting sale ' . $sale_id,
                    'trans_location'=>$item['item_location'],
                    'trans_inventory'=>$item['quantity_purchased']
                );
                // update inventory
                $this->Inventory->insert($inv_data);
                // update quantities
                $this->Item_quantities->change_quantity($item['item_id'],
                    $item['item_location'],
                    $item['quantity_purchased']);
            }
        }
        // delete all items
        $this->db->delete('sales_items', array('sale_id' => $sale_id));
        // delete sale itself
        $this->db->delete('sales', array('sale_id' => $sale_id));
        // execute transaction
        $this->db->trans_complete();
        return $this->db->trans_status();
    }
    function get_sale_items($sale_id)
    {
        $this->db->from('sales_items');
        $this->db->where('sale_id',$sale_id);
        return $this->db->get();
    }
    function get_sale_payments($sale_id)
    {
        $this->db->from('sales_payments');
        $this->db->where('sale_id',$sale_id);
        return $this->db->get();
    }
    function get_customer($sale_id)
    {
        $this->db->from('sales');
        $this->db->where('sale_id',$sale_id);
        return $this->Customer->get_info($this->db->get()->row()->customer_id);
    }
        function get_vehicle($sale_id)
    {
        $this->db->from('sales');
        $this->db->where('sale_id',$sale_id);
        return $this->Vehicle->get_info($this->db->get()->row()->vehicle_id);
    }
    function invoice_number_exists($invoice_number,$sale_id='')
    {
        $this->db->from('sales');
        $this->db->where('invoice_number', $invoice_number);
        if (!empty($sale_id))
        {
            $this->db->where('sale_id !=', $sale_id);
        }
        $query=$this->db->get();
        return ($query->num_rows()==1);
    }
    //We create a temp table that allows us to do easy report/sales queries
    public function create_sales_items_temp_table()
    {
        if ($this->config->item('tax_included'))
        {
            $total = "1";
            $subtotal = "(1 - (SUM(1 - 100/(100+percent))))";
            $tax="(SUM(1 - 100/(100+percent)))";
        }
        else
        {
            $tax = "(SUM(percent)/100)";
            $total = "(1+(SUM(percent/100)))";
            $subtotal = "1";
        }
        $this->db->query("CREATE TEMPORARY TABLE ".$this->db->dbprefix('sales_items_temp')."
        (SELECT date(sale_time) as sale_date, sale_time, ".$this->db->dbprefix('sales_items').".sale_id, comment,payments.payment_type, item_location, customer_id, vehicle_id, employee_id,
        ".$this->db->dbprefix('items').".item_id, supplier_id, quantity_purchased, item_cost_price, item_unit_price, SUM(percent) as item_tax_percent,
        discount_percent, ROUND((item_unit_price*quantity_purchased-item_unit_price*quantity_purchased*discount_percent/100)*$subtotal,2) as subtotal,
        ".$this->db->dbprefix('sales_items').".line as line, serialnumber, ".$this->db->dbprefix('sales_items').".description as description,
        ROUND((item_unit_price*quantity_purchased-item_unit_price*quantity_purchased*discount_percent/100)*$total, 2) as total,
        ROUND((item_unit_price*quantity_purchased-item_unit_price*quantity_purchased*discount_percent/100)*$tax, 2) as tax,
        ROUND((item_unit_price*quantity_purchased-item_unit_price*quantity_purchased*discount_percent/100)- (item_cost_price*quantity_purchased), 2) as profit
        FROM ".$this->db->dbprefix('sales_items')."
        INNER JOIN ".$this->db->dbprefix('sales')." ON  ".$this->db->dbprefix('sales_items').'.sale_id='.$this->db->dbprefix('sales').'.sale_id'."
        INNER JOIN ".$this->db->dbprefix('items')." ON  ".$this->db->dbprefix('sales_items').'.item_id='.$this->db->dbprefix('items').'.item_id'."
        INNER JOIN (SELECT sale_id, SUM(payment_amount) AS sale_payment_amount, 
        GROUP_CONCAT(payment_type SEPARATOR ', ') AS payment_type FROM " .$this->db->dbprefix('sales_payments') . " GROUP BY sale_id) AS payments 
        ON " . $this->db->dbprefix('sales_items') . '.sale_id'. "=" . "payments.sale_id     
        LEFT OUTER JOIN ".$this->db->dbprefix('suppliers')." ON  ".$this->db->dbprefix('items').'.supplier_id='.$this->db->dbprefix('suppliers').'.person_id'."
        LEFT OUTER JOIN ".$this->db->dbprefix('sales_items_taxes')." ON  "
        .$this->db->dbprefix('sales_items').'.sale_id='.$this->db->dbprefix('sales_items_taxes').'.sale_id'." and "
        .$this->db->dbprefix('sales_items').'.item_id='.$this->db->dbprefix('sales_items_taxes').'.item_id'." and "
        .$this->db->dbprefix('sales_items').'.line='.$this->db->dbprefix('sales_items_taxes').'.line'."
        GROUP BY sale_id, item_id, line)");
        //Update null item_tax_percents to be 0 instead of null$this->db->where('item_tax_percent IS NULL');
        $this->db->update('sales_items_temp', array('item_tax_percent' => 0));
        //Update null tax to be 0 instead of null
        $this->db->where('tax IS NULL');
        $this->db->update('sales_items_temp', array('tax' => 0));
        //Update null subtotals to be equal to the total as these don't have tax
        $this->db->query('UPDATE '.$this->db->dbprefix('sales_items_temp'). ' SET total=subtotal WHERE total IS NULL');
    }
    public function get_giftcard_value( $giftcardNumber )
    {
        if ( !$this->Giftcard->exists( $this->Giftcard->get_giftcard_id($giftcardNumber)))
            return 0;
        $this->db->from('giftcards');
        $this->db->where('giftcard_number',$giftcardNumber);
        return $this->db->get()->row()->value;
    }
}
?>