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<?php
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class tuniuprice_model extends CI_Model {
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function __construct() {
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parent::__construct();
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$this->INFO = $this->load->database('INFO', TRUE);
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}
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//新增或更新缓存
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public function addOrUpdate($tpc_from_station,$tpc_to_station,$tpc_content){
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$sql = "IF NOT EXISTS(
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SELECT 1
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FROM TrainPriceCache
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WHERE
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tpc_from_station = '$tpc_from_station'
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AND tpc_to_station = '$tpc_to_station'
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) BEGIN
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INSERT INTO TrainPriceCache
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(
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tpc_from_station,
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tpc_to_station,
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tpc_content,
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tpc_datetime,
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tpc_source
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)
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VALUES
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(
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'$tpc_from_station','$tpc_to_station','$tpc_content',GETDATE(),'tuniu'
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)
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END
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ELSE
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BEGIN
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UPDATE TrainPriceCache
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SET tpc_from_station = '$tpc_from_station',
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tpc_to_station = '$tpc_to_station',
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tpc_content = '$tpc_content',
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tpc_datetime = GETDATE(),
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tpc_source = 'tuniu'
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WHERE
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tpc_from_station = '$tpc_from_station'
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AND tpc_to_station = '$tpc_to_station'
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END
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";
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$query = $this->INFO->query($sql);
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return $query;
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}
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//获取缓存的火车信息
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//如果读取到缓存是7天以前的数据就不返回任何数据，并且将其删除。
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public function get_train_cache($tpc_from_station,$tpc_to_station){
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$sql = "SELECT
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*
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FROM
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TrainPriceCache
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WHERE
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tpc_from_station = '$tpc_from_station'
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AND
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tpc_to_station = '$tpc_to_station'";
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$query = $this->INFO->query($sql);
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return $query->row();
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}
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//获取价格
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public function get_price($fromStationCode,$toStationCode,$trainCode){
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$sql = "SELECT
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TPL_Price
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FROM
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TrainPriceList
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WHERE
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TPL_Train_Code = '$trainCode'
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AND
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TPL_From_Station_Code = '$fromStationCode'
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AND
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TPL_To_Station_Code = '$toStationCode'";
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$query = $this->INFO->query($sql);
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return $query->row();
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}
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}
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?>
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