Question

我正在尝试从数据库doctrine查询迭代数组。获取id字段的值后，将其设置为方法的返回类型值。在获取端点uri时，它返回状态200 - 响应为空

这是我的尝试。

/**
 * @Route("/get/{email}")
 */
 public function emailAction($email)
 {
     $var = "";
   $singleresult = $this->getDoctrine()->getRepository('Api3Bundle:Influ')->findOneBy(array('email' => $email));
   if ($singleresult === null) {
   return new View("user not found", Response::HTTP_NOT_FOUND);
   }
//area of problem
   foreach($singleresult as $users)
     {
       $var = $users.id;
     }
 return $var;
//end of area of problem
 }

我正在尝试使用电子邮件返回ID。上述尝试通过邮递员显示响应为空

Answer 1

如果private static String url_all_customers = "http://developer-api.bringg.com/partner_api/customers"; // JSON Node names private static final String TAG_SUCCESS = "success"; private static final String TAG_CUSTOMERS = "customers"; private static final String TAG_CID = "cid"; private static final String TAG_NAME = "name"; // products JSONArray JSONArray products = null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.all_customers); // Hashmap for ListView productsList = new ArrayList<HashMap<String, String>>(); // Loading customers in Background Thread new LoadAllCustomers().execute(); // Get listview ListView lv = getListView(); // on seleting single customers // launching Edit Customers Screen lv.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { // getting values from selected ListItem String pid = ((TextView) view.findViewById(R.id.cid)).getText() .toString(); // Starting new intent Intent in = new Intent(getApplicationContext(), EditProductActivity.class); // sending pid to next activity in.putExtra(TAG_CID, cid); // starting new activity and expecting some response back startActivityForResult(in, 100); } }); } /** * Background Async Task to Load all custormer by making HTTP Request * */ class LoadAllCustormers extends AsyncTask<String, String, String> { /** * Before starting background thread Show Progress Dialog * */ @Override protected void onPreExecute() { super.onPreExecute(); pDialog = new ProgressDialog(AllCustormersActivity.this); pDialog.setMessage("Loading custormers. Please wait..."); pDialog.setIndeterminate(false); pDialog.setCancelable(false); pDialog.show(); } protected String doInBackground(String... args) { // Building Parameters List<NameValuePair> params = new ArrayList<NameValuePair>(); // getting JSON string from URL JSONObject json = jParser.makeHttpRequest(url_all_customers, "GET", params); // Check your log cat for JSON reponse Log.d("All Customers: ", json.toString()); try { // Checking for SUCCESS TAG int success = json.getInt(TAG_SUCCESS); if (success == 1) { // products found // Getting Array of Customers customers = json.getJSONArray(TAG_CUSTOMER); // looping through All Customers for (int i = 0; i < customers.length(); i++) { JSONObject c = customers.getJSONObject(i); // Storing each json item in variable String id = c.getString(TAG_CID); String name = c.getString(TAG_NAME); // creating new HashMap HashMap<String, String> map = new HashMap<String, String>(); // adding each child node to HashMap key => value map.put(TAG_PID, id); map.put(TAG_NAME, name); // adding HashList to ArrayList productsList.add(map); } } else { // no customers found // Launch Add New customer Activity Intent i = new Intent(getApplicationContext(), NewCustomerActivity.class); // Closing all previous activities i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); startActivity(i); } } catch (JSONException e) { e.printStackTrace(); } return null; } protected void onPostExecute(String file_url) { // dismiss the dialog after getting all customers pDialog.dismiss(); // updating UI from Background Thread runOnUiThread(new Runnable() { public void run() { /** * Updating parsed JSON data into ListView * */ ListAdapter adapter = new SimpleAdapter( AllCustomersActivity.this, customersList, R.layout.list_item, new String[] { TAG_CID, TAG_NAME}, new int[] { R.id.cid, R.id.name }); // updating listview setListAdapter(adapter); } }); } }只有一个结果，那你为什么要使用foreach（）？

如果$singleresult有多个结果，您将循环遍历所有结果并返回最后一个（因为之前的所有$singleresult都将被覆盖。

如果没有循环，您是否无法直接访问$var？

如果$singleresult->id为空，也许你可以通过返回id内的所有内容来开始调试，看看为什么没有$singleresult。

迭代数组以从数据库symfony2控制器方法

1 个答案: