宝石kaminari中的分页错误？

Question

我正在处理rails 4，这是我的步骤： -

1. gem kaminari --in gemfile
2. 捆绑安装
3. @vendors = Vendor.order(:name).page params[:page] vendor_controller.rb) 还试过@vendors=Vendor.order("name").page(params[:page]).per(5)
在<% = paginate @vendors %> 中
4. index.html.erb

   错误： -

   undefined method `page' for #<ActiveRecord::Relation::ActiveRecord_Relation_Vendor:0x16bec10>
   

   我也试过console

   Vendor.count                 
   a = Vendor.limit(5).count     
   b = a.page(1).per(20).size
   

   错误： -     NOmethoderror undefined method 'page'

   问题： -  哪里出错了？？

   由于

Answer 1

尝试直接从ActiveRecord类调用页面方法。您在订单后调用它，返回ActiveRecord::Relation个对象。

@vendors = Vendor.page(params[:page]).order(:name)

Answer 2

我认为这可以解决您的问题：

private void createHotspot2() {
WifiManager wifiManager = (WifiManager) getApplicationContext().getSystemService(Context.WIFI_SERVICE);
WifiConfiguration wifiConfiguration = new WifiConfiguration();
wifiConfiguration.SSID = "MyDummySSID";
wifiConfiguration.preSharedKey = "abcdefgh123";
wifiConfiguration.status = WifiConfiguration.Status.ENABLED;
wifiConfiguration.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
wifiConfiguration.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
wifiConfiguration.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
wifiConfiguration.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
wifiConfiguration.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
try {
Method method = wifiManager.getClass().getMethod("setWifiApEnabled", WifiConfiguration.class,
boolean.class);
method.invoke(wifiManager, wifiConfiguration, true);

} catch (Exception e) {
e.printStackTrace();
}
}

在模型中使用：

 vendor.except(:limit, :offset)