使用了thinkphp的数据库操作原理，用户可以使用thinkphp的数据库操作，但是针对数据库操作整体进行了封装，数据查询更加方便，所以建议用户使用专门封装的数据库操作便于整体管理。
### 1.**数据查询**
查询单条数据 getInfo($condition, $field):$condition:表示传入条件，$field:表示查询字段
~~~php
model('help')->getInfo([ ['id', '=', $help_id], ['site_id', '=', $site_id] ], 'id, title, content, class_id, class_name, sort, link_address, create_time, modify_time');
~~~
查询列表getList($condition = \[\], $field = true, $order = '', $alias = 'a', $join = \[\], $group = '', $limit = null)
~~~php
model('help')->getList($condition, $field, $order, '', '', '', $limit);
~~~
查询分页列表pageList($condition = \[\], $field = true, $order = '', $page = 1, $list\_rows = PAGE\_LIST\_ROWS, $alias = 'a', $join = \[\], $group = null, $limit = null)
~~~php
model('help')->pageList($condition, $field, $order, $page, $page_size);
~~~
查询视图，按照thinkphp视图查询方法：
~~~php
public function getApplyDetail($condition)
{
$field = 'nsa.apply_id, nsa.site_id,nsa.website_id, nsa.member_id, nsa.username, nsa.cert_id, nsa.shop_name, nsa.apply_state,
nsa.apply_message, nsa.apply_year, nsa.category_name, nsa.category_id, nsa.group_name, nsa.group_id,
nsa.paying_money_certificate, nsa.paying_money_certificate_explain, nsa.paying_deposit, nsa.paying_apply,
nsa.paying_amount, nsa.create_time, nsa.audit_time, nsa.finish_time,
nsc.cert_id, nsc.cert_type, nsc.company_name, nsc.company_province_id, nsc.company_city_id, nsc.company_district_id,
nsc.company_address, nsc.contacts_name, nsc.contacts_mobile, nsc.contacts_card_no, nsc.contacts_card_electronic_1,
nsc.contacts_card_electronic_2, nsc.contacts_card_electronic_3, nsc.business_licence_number,
nsc.business_licence_number_electronic, nsc.business_sphere, nsc.taxpayer_id, nsc.general_taxpayer,
nsc.tax_registration_certificate, nsc.tax_registration_certificate_electronic, nsc.bank_account_name,
nsc.bank_account_number, nsc.bank_name, nsc.bank_address, nsc.bank_code, nsc.bank_type, nsc.settlement_bank_account_name,
nsc.settlement_bank_account_number, nsc.settlement_bank_name, nsc.settlement_bank_address,nsc.company_full_address,
w.site_area_name';
$alias = 'nsa';
$join = [
[
'shop_cert nsc',
'nsa.cert_id = nsc.cert_id',
'left'
],
[
'website w',
'w.site_id = nsa.website_id',
'left'
],
];
$info = model('shop_apply')->getInfo($condition, $field, $alias, $join);
return $this->success($info);
}
~~~
查询第一条数据getFirstData($condition, $order)
获取查询数据的数量getCount($condition)
获取查询字段和getSum($condition, $field)
获取查询字段最大值getMax($condition, $field)
获取查询字段最小值getMin($condition, $field)
### **2\. 数据添加**
niushop数据添加使用add方法，例如：
~~~php
/**
* 添加帮助文章
* @param array $data
*/
public function addHelp($data)
{
$help_id = model('help')->add($data);
Cache::tag("help")->clear();
return $this->success($help_id);
}
~~~
### **3\. 数据修改，使用update方法，传入修改条件**
~~~php
/**
* 修改帮助文章
* @param array $data
*/
public function editHelp($data, $condition)
{
$res = model('help')->update($data, $condition);
Cache::tag("help")->clear();
return $this->success($res);
}
~~~
### **4\. 数据删除，使用delete方法**
~~~php
/**
* 删除文章
* @param unknown $coupon_type_id
*/
public function deleteHelp($condition)
{
$res = model('help')->delete($condition);
Cache::tag("help")->clear();
return $this->success($res);
}
~~~
