I extended an Ext.data.Store (i.e users with model user) but when I iterate over custom JSON response and add each record, it replaces the first record and so the store consist of just one record instead of many
Here is my code (in image format) notice in line 215 i added a model on store on each iteration:
And here is the console output w/c only shows 1 on getCount():
I tried many solutions, and that includes changing the 'id' attribute to something else and also differ my user model to users model
But I have another store that is adding fine without problems.
EDIT: I tried adding it through javascript console and still it replaces the record 1:
The store's add function will automatically handle creation of the model(s). Your callback should be as simple as this:
callback: function(optionsusers, successusers, responseusers) {
loadingLoginModal.hide();
var responseusersJSON = Ext.JSON.decode(responseusers.responseText);
userStore.add(responseusersJSON);
loadingLoginModal.destroy();
that.showHomeView();
}
Related
I am trying to prevent duplicate items from being entered in an Interactive Grid in Oracle Apex 20.2. I do get a unique constraint error when this happens, but this is for a barcode scanning stock control app and the unique constraint error only happens when saving after scanning a room with lots of objects. It is then very difficult to find the duplicate field. You also cannot use sort, since that wants to refresh the page and looses all your scanned items. I cannot presort because I want the last scanned item on top.
I was able to add Javascript on page load that creates an array with all the barcodes. I then check this array when scanning and do not add new Interactive Grid rows when a duplicate barcode is going to be added to the array.
In addition to this I need to add the same for when an Interactive Grid row is manually entered. For this I wanted to add a Javascript dynamic action on the barcode column in the Interactive Grid, in order to once again check the global array for uniqueness. However I have several issues: I cannot figure out how the get the entered barcode value in the change dynamic action Javascript, sometimes it shows the previous changed value (might be this bug although I am in 20.2) and the Change event also seems to fire twice when hitting enter after entering a value (once for the new row (this time my code works unlike when hitting Tab) and once for the next row below). The last one seems bad, since then it will try to check existing values (the next row) and give errors that should not happen; however I do not see a more appropriate event like On Row Submit. Not sure if there is a way to check whether the value changed on the Change event.
The code I currently have I got from here. I am assuming this means Oracle Apex does not have a standard way of getting an Interactive Grid column value in a Javascript dynamic action. Not sure if this has changed in 20.2 or 21. The code I have is:
console.log($(this.triggeringElement));
var grid = apex.region('LINES').widget().interactiveGrid('getViews', 'grid');
var model = grid.model;
var selectedRow = grid.view$.grid('getSelection');
var id = $(selectedRow[0][0]).data('id');
var record = model.getRecord(id);
let bcode = model.getValue(record, 'BARCODE');
console.log(id);
console.log(record);
console.log($(selectedRow[0][0]));
console.log(bcode);
if(barcodes.includes(bcode)) {
apex.message.showErrors([{
type: "error",
location: "page",
message: "The entered barcode is already in the list.",
unsafe: false
}]);
}
When I console.log(record) I can see values that I enter into the barcode column, but I do not know how to walk the object tree in order to retrieve the value out of the record. I do not understand the object it shows me in the console log. It does not seem to correlate with the dot access traversals that others are doing in the above code. I can see the record array at the top, but for that the barcode column shows the previous value; below that it does however show the newly entered value as the third (2) index, but I do not know how to write Javascript to access that.
If I can access the previous and new value from the record object I could check for changes and also compare the new value against the global array. How do I access these values in the record object or is there a better way of achieving my goal? bcode prints the previous value, so I guess I already have that if that is not a bug.
Let's imagine a situation like this:
I have an ViewBag dynamic object which is basically a list fille with some results;
Scenario 1:
User 1 comes in and fills the ViewBag.Products object with a list of 50 items inside;
Scenario 2:
User 2 comes in and fills ViewBag.Products object with a list of 50 NEW items which ARE DIFFERENT than the previous 50 ones of a user 1.
Now when the both users get displayed results onto their page, which is located at /Analyze/Index <- view
I enable them so that they can sort out that list by a certain property of a class which is located inside the object like this:
public JsonResult GetSortedBySales()
{
var list = lista.OrderByDescending(x => x.SaleNumber).ToList();
return Json(list, JsonRequestBehavior.AllowGet);
}
public JsonResult GetSortedByFeedback()
{
var list = lista.OrderByDescending(x => x.Feedback).ToList();
return Json(list, JsonRequestBehavior.AllowGet);
}
As you can see this produces an issue like this:
The last user that added it's own items to the list are the items which will be shown to User 1 when he tries to sort out the list, since the list is now filled with User #2's items...
The list is filled with the items from the eBay API, therefore I cannot guarantee the integrity and uniqueness of the data to each user...
What I thought I can do here?? Is that I can store these items from the list somehow into the local jquery array and then perform the sorting from that local array, so that each jquery array is local to each user in their browser and no mixing of data is done...
Do you guys understand me what I'm trying to achieve here?
I apologize if my English is bad, I've tried my best to explain the issue that I have.
Edit: here is more data on what I'm trying to achieve
Basically I have a form where users perform a search of ebay items based on a certain keyword. After the search via http request I display the results to them in a manner where they can select all of those products in a table and then perform analyzing of those selected products.
Then they are transferred with another page with the analyzed data and I display the results to them in the list object called "lista".
The "lista" list is always filled differently based on what the user searches on the page via the process that I just explained above.
So the "lista" object is always filled with the new data and when the user performs sorting of data in list "lista" they are always displayed differently if 2 users perform analyzing of data like in scenario 1 and 2 that I explained above.
Does this helps?
Edit 2:
Here is a graphical explanation of what I ment
Step 1:
Step 2:
P.S. the "lista" list is declared as static, is that what's causing the issue?
Edit again:
Okay so guys I've found a way so that the data isn't changed when I sort it. Instead of doing a jQuery post, I perform sorting of data based on two extra attributes that I added into my table tr - sales and feedback and then sorted it like following:
$(".feedbackClick").click(function() {
var $wrapper = $('#tableSellers');
$wrapper.find('.test').sort(function(a, b) {
return +$(b).attr('feedback') - +$(a).attr('feedback');
}).appendTo($wrapper);
});
This sorts the data locally in jQuery thus no data is lost at the time when multiple users perform a search.
P.S. the "lista" list is declared as static, is that what's causing the issue?
Yes. That is the problem.
You should almost never be using static variables in a web site, as those variables will end up being shared across all users.
I'm using a factory to create different user-Objects from data which comes from the Server. Each user-Object has a "userGroup"-property. A list of users is displayed using ng-repeat in the View. And there it is possible to change the userGroup-value from "basic" to "admin", because of the AngularJS 1 two way binding. So the original values of the Object are gone. So my question is: when we want to cancel the made changes where should the initial value {userGroup: "basic"} be stored?
I was thinking about two possible solutions:
create an additional property "initUserGroup" in the User Factory Class and store a value for each Object
use localstorage (up to 20 records must be saved at once)
Are there any best practices for such cases?
For example, you can backup whole object in a property like _backup (using angular.copy) and restore if you with to undo changes (using angular.extend). Here is an example:
$scope.editItem(item) {
item._backup = angular.copy(item);
}
$scope.undoEdit(item) {
angular.extend(item, item._backup);
//delete unused data
delete(item._backup);
}
In this case you won't need to save data outside current object.
I'm trying to modify the stocklist Dynagrid demo which is designed to work with HTML5 and Javascript, it's originally designed to subscribe an item per subscription.
In my case, I have connected this demo to my lightstreamer server, the adapter in my server deals with itemgroub and fieldschema instead of itemList and fieldList which was used in the example.
I modified the code to subscribe using this item group and equivalent field schema, now the dynagrid listener (onVisualUpdate function) is capable to detect how many items in the item group and based on that it creates the equivalent number of rows, however, when I call getChangedFieldValue for and one of the fields in the dynagrid, I get null always, and based of that no data is updated on the screen.
What is the solution for this problem, and how can I get the updated values?
(Note: Currently, I get the data directly from the info paramter which is passed to onVisualUpdate function).
When using a Field Schema, fields in the subscription are identified by their 1-based index within the schema and not by their name. So, wen you call getChangedFieldValue try to use the 1-based index to identify a field.
I've been trying to figure this out for quite some time now. I couldn't find anything that addresses this problem, but please correct me if I'm wrong.
The problem:
I have data from a JSON API comming in, with an nested array/object structure. I use mapping to initially fill the model with my data. To update this, I want to extend the model if new data arrives, or update the existing data.
As far as I found out, the mapping option key, should do this trick for me, but I might have misunderstood the functionality of the mapping options.
I've boiled down the problem to be represented by this example:
var userMapping = {
key: function(item) {
return ko.utils.unwrapObservable(item.id);
}
};
// JSON call replaced with values
var viewModel = {
users: ko.mapping.fromJS([], userMapping)
};
// Should insert new - new ID?
ko.mapping.fromJS([{"id":1,"name":"Foo"}, {"id":2,"name":"Bar"}], userMapping, viewModel.users);
// Should only update ID#1 - same ID?
ko.mapping.fromJS([{"id":1,"name":"Bat"}], userMapping, viewModel.users);
// Should insert new - New ID?
ko.mapping.fromJS([{"id":3,"name":"New"}, {"id":4,"name":"New"}], userMapping, viewModel.users);
ko.applyBindings(viewModel);
Fiddle: http://jsfiddle.net/mikaelbr/gDjA7/
As you can see, the first line inserts the data. All good. But when I try to update, it replaces the content. The same for the third mapping; it replaces the content, instead of extening it.
Am I using it wrong? Should I try to extend the content "manually" before using mapping?
Edit Solution:
I solved this case by having a second helper array storing all current models. On new data i extended this array, and updated the view model to contain the accumulated items.
On update (In my case a WebSocket message), I looped through the models, changed the contents of the item in question, and used method valueHasMutated() to give notice of changed value to the Knockout lib.
From looking at your example code the mapping plugin is behaving exactly as I would expect it to. When you call fromJS on a collection you are effectively telling the mapping plugin this is the new contents of that collection. For example:
On the second line, How could it know whether you were updating or whether you had simply removed id:2?
I can't find any mention of a suitable method that treats the data as simply an update, although you could add one. Mapped arrays come with some helpful methods such as mappedIndexOf to help you find particular items. If you receive an update data set simply loop through it, find the item and update it with a mapping.fromJS call to that particular item. This can easily be generalized into reusable method.
You can use ko.mapping.updateFromJS() to update existing values. However, it does not add new values so that would be a problem in your instance. Take a look at the link below for more details.
Using updateFromJS is replacing values when it should be adding them
Yes, you should first collect all data into a list or array and then apply the mapping to that list. Otherwise you are going to overwrite the values in your viewModel.