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Django AJAX call: Referencing Table in JS


Django AJAX call: Referencing Table in JS

By : user2953669
Date : November 21 2020, 01:01 AM
I hope this helps you . A couple of things need to be cleaned up in order for this solution to work:
Your idea that global phonebook will be available from within get_next_3_contacts() is incorrect. When you make the AJAX call that will ultimately invoke get_next_3_contacts() the variable phonebook is no longer available. It went out of scope when the call to phonebook_home() completed.
code :
def phonebook_home(request, offset, count):
    phonebook = phonebook.objects.all()[offset:offset+count]
import json
from django.http import JsonResponse
def phonebook_home(request, offset, count):
    status = "OK"
    return_data = ""

    try:
        phonebook = phonebook.objects.all()[offset:offset+count]
        return_data = json.dumps(phonebook)
    exception:
        status = "UH OH"

    return JsonResponse({'data': return_data, 'status': status)


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Self referencing a table in django

Self referencing a table in django


By : disword
Date : March 29 2020, 07:55 AM
To fix this issue Can you imagine an instance where there are gym member in a database. Some of the people are only gym members, while some people are gym members AND coaches.
So if in the database, there is a column for each member's coach's memberId, then the database will self reference itself when you use a memberId that is already in the database as the coach. That is a use of self-referencing.
Referencing a variable in a delayed AJAX call correctly

Referencing a variable in a delayed AJAX call correctly


By : user3089775
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Congratulations, you've been stumped by a closure! This graduates you to the next level of JavaScript developer. This calls for a cup of coffee (it's not even midnight yet).
A closure is when one function is inside another, and the inner function uses a variable from the outer function. In your case, the AJAX success handler is using albumCounter.
code :
var i = 0;
function outerFunction(){
  i++;
  function innerFunction(){
    setTimeout(function(){
      console.log(i);
    }, 5000);
  };
  innerFunction(); //execute the inner function
}

outerFunction();
outerFunction();
outerFunction(); //in 5 seconds, logs the number 3, 3 times
 function outerFunction(iterator){
   function innerFunction(){
     setTimeout(function(){
       console.log(iterator);
     }, 5000);
  };
  innerFunction(); //execute the inner function
}
 for(var i = 0; i < 3; i++){
   outerFunction(i); //logs 1, 2, 3 in 5 seconds
}
function fetchAlbum(albumCounter) { //the outer function

  var albumElement = $('<div/>', { id: 'albumplaceholder-' + albumCounter }).html('Loading...').appendTo('#results');

  var callbackID = '#albumplaceholder-' + albumCounter;

  imgurJSON = $.ajax({ //execute the inner function
     //...
     success : function() { //the inner function
         $(callbackID).html(imgurJSON.responseJSON.data //...);
     }
  });
}

fetchAlbum(1);
fetchAlbum(2); // In other words, something outside of `fetchAlbum()`
fetchAlbum(3); // should oversee which album to fetch.
Laravel AJAX Post Referencing ID on Table

Laravel AJAX Post Referencing ID on Table


By : Bobbi Bobz McCartney
Date : March 29 2020, 07:55 AM
it should still fix some issue This has to be a basic issue. I have a post request to delete a record from a database table, but it's not deleting. It's because in my AJAX request and URL, I reference the ID of the record in the table, but the controller method does not associate this variable with the ID column. , I just figure out that your method should look like something
code :
public function postDeleteNotification(Request $request,$username, $id)
{
    if ($request->ajax())
    {
        DB::table('notifications_user')
        ->where('user_id', Auth::user()->id)
        ->where('id', $id)
        ->delete();
    }
}
How to pass values checked inside a cell in a table returned from one ajax call to another ajax call ?

How to pass values checked inside a cell in a table returned from one ajax call to another ajax call ?


By : Narasimha Rao
Date : March 29 2020, 07:55 AM
seems to work fine My first JavaScript named DisplayFruitToOrder() makes an Ajax call that returns table with fruits info. I want to display check box by the side of fruit name if it is either Apple, Orange, or Banana. After displaying the table in HTML, user will mark the check box to order either of those 3 fruits, and click Order Fruit button. After clicking Order Fruit button, I want to trigger another JavaScript function called orderFruit() which will make another Ajax call to order the fruits selected by users. I completed the displaying check box by the side of fruit name part, but I am stuck in second part i.e. ordering only the marked ones from either Apple, Orange, or Banana. How can I pass checked value inside a cell in the table returned from one Ajax call to Another? I have attached image of sample table generated from first Ajax call from first JavaScript function. enter image description here , Put a class name for all checkbox and data attribute like,
code :
tr.append("<td>" + data.FruitName + " <input type='checkbox' class='chkbx' data-fruit='"+data.FruitName+"' /></td>");
function orderFruit() {
var fruitToOrder = "";

$('.chkbx:checkbox:checked').each(function(){
fruitToOrder = fruitToOrder + $(this).attr("data-fruit") + ",";
});
    console.log("Fruit to order is: " + fruitToOrder);

} 
querying a self referencing table in Django

querying a self referencing table in Django


By : Oliver Dipple
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Yes, you can use like your code.
and Yes again, but little bit different.
code :
children = User.objects.filter(parent__id=PARENT_ID)
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