I use select2 for specifying recipients for the website's inner messaging system. There are users and they can send messages to each other. They can search other users by the user name.
I use the following config:
this.$select2.select2({
multiple: true,
ajax: {
url: "/userSearch",
dataType: "json",
},
templateResult: function(data) {
var user = new SomeComplexUserModel(data);
var $div = $(<div></div>");
$div.append("<img src='"+user.image.readPaths().crop+"'>");
$div.append("<span>"+user.fullName()+"</span>");
return $div;
},
templateSelection: ..the same as templateResult..
Now I want to set initial value for this. How to do that? I have the list of ids of the users that have to be selected on page load. I make the separate request to /userSearch and receive the data. Then I'm trying to push this data to the select2 somehow.
I can't create native var opt = new Option(text,value); select.append(opt) because this case templateSelection gets only id and text from the option, it can't construct the user model based on this data only. It does not show users with avatars.
I tried to trigger select2:select event with {originalEvent:null,data:$.extend(ajaxResult,{selected:true,disabled:false,element:null},_type:"select")}, but it seems it does not work this direction. It emits events but is not subscribed for them.
I also tried to set this.$select2.val(ajaxData); this.$select2.trigger('change'), after select2 initialization, but it does not work either.
Related
I'm new to ruby on rails. I'm trying to save data that is generated by itself to the database. i have looked into and found I was meant to use ajax, however all the videos/forums i have seen are example of ajax that use form and not refreshing page. i want to save data automatically without pressing submit.
Assume that the project is fresh project with postgresql as the database. I have created a database that can hold geo points by using postgis. i have created another page where it has map implemented where i can manully pin location. I want to save the manuuly pinned location to the database.
function onMapClick(e) {
alert("You clicked the map at " + e.latlng);
}
mymap.on('click', onMapClick);
var popup = L.popup();
function onMapClick(e) {
popup
.setLatLng(e.latlng)
.setContent("You clicked the map at " + e.latlng.toString())
.openOn(mymap);
}
mymap.on('click', onMapClick);
The e.latlng holds the geopoint, but i dont know how to save it the database if the user clicks anywhere on the map.
You don't need submit form to use ajax.
Basically what you want is add event listener to the map, and when user click then send ajax request to the controller.
For example, let's say that your map is inside div with id my-map.
If you use jQuery you can write something like this:
$('#my-map').on('click', function() {
# add your logic here
$.ajax({
url: 'your-url',
type: 'POST',
dataType: 'json',
contentType: "application/json; charset=utf-8",
data: JSON.stringify({
'let': data you want to send to backend
})
}
Hope it works!
EDIT:
After I looked your code I found that you can not have jQuery in your project so you can not use jQuery ajax. You need use vanilla javascript. So instead this snippet above, you can write this.
var xhttp = new XMLHttpRequest();
const params = { saving_location: { geoPoints: e.latlng } }
xhttp.onreadystatechange = function() {//Call a function when the state changes.
if(xhttp.readyState == 4 && xhttp.status == 200) {
alert(http.responseText);
}
}
xhttp.open("POST", "/saving_locations", true);
xhttp.setRequestHeader('Content-Type', 'application/json', 'Accept', 'application/json');
xhttp.send(JSON.stringify(params));
Also add protect_from_forgery with: :null_session in your application controller and skip_before_action :verify_authenticity_token in your Saving Location controller.(under before_action).
Here is good blog post why you need this https://blog.nvisium.com/understanding-protectfromforgery
Please notice that you wan't save your database, because your geoPoints type in database is type of point and you send string to rails controller. I never work with points in rails so I can not help you here.(You can always add two columns in db, one for longitude and one for latitude and then store numbers instead point)
I have 3 different components with buttons to navigate across them. All of the default form values are pulled from the DOM and set into the data beforeMount. The reason I'm doing it this way is that the values are coming from my Rails database.
When I edit a form and save it successfully (via ajax), everything is good but once I switch components using the navigation, those values in the inputs are reset back to the original/old values since the beforeMount is running again and the DOM was not updated with the new value (due to no refresh yet).
I tried changing the original values in the DOM with jQuery upon every update but that didn't work. It would work once but further updates didn't change.
Here is how I'm setting the data inside of the beforeMount:
const element = document.getElementById('setting');
const setting = JSON.parse(element.dataset.setting)
this.discountType = setting.discount_type;
Then, upon every ajax request I tried to edit those original values in the DOM which didn't work:
outerThis = this;
Rails.ajax({
url: '/update-settings',
type: 'POST',
data: data,
dataType: 'json',
success: (data) => {
ShopifyApp.flashNotice('Successfully updated')
var settings = $('#setting').data('setting')
settings.discount_type = outerThis.discountType
},
error: (err) => {
ShopifyApp.flashError('There was an error')
}
})
What's the recommended way to go about this issue?
I have Entry model with url field, which contains link to external site.
In view I list these links, and now I'd like to start counting when someone clicks it, and keep this info in database. What's the best way of doing it?
You can easily use google analytics to track outbound links: http://support.google.com/analytics/bin/answer.py?hl=en&answer=1136920
If that is not an option you will need to add some javascript to your links make an ajax request to the server to increment the count before transferring the user to the new url. Something similar to this jquery code:
$('a').click(function(){
var stored_ulr = $(this).attr('href');
$.ajax({
url: #your server url to increment count,
data: #data you need to send,
success: function() { window.location = stored_url; },
});
return false;
});
The above code is just a general outline. You will have to fill in the blanks and make it work for your needs.
How to configure the Kendo UI grid, so it would issue requests only for specific (displayed) fields?
In my instance, a Kendo UI grid is bound to a OData service. The service exposes a table with many (200+) fields. The app allows users to configure displayed field set of the Grid, set initial filters and sort parameters. The app configures the Grid, which then goes off and queries OData service.
The grid kendo.Data.DataSource is defined as:
var gridDataSource = new kendo.data.DataSource({
type: "odata",
transport: {
read: {
url: "#Url.Content(dynDataSource.Url)",
contentType: "application/json; charset=utf-8",
type: "GET",
dataType: "json"
}
},
pageSize: #Model.MaxPageSize,
serverPaging: true,
serverFiltering: true,
serverSorting: true,
filter: ...
}
Here's a sample request issued by the Grid (captured by Firebug):
http://localhost:22411/Data/Comp?%24inlinecount=allpages&%24top=1000&%24filter=DistrictCode+eq+%27460800%27
This returns all the fields of the table, which is a problem. The fields need to be limited by selecting only the required fields, the request for which would look like:
http://localhost:22411/Data/Comp?%24inlinecount=allpages&%24top=1000&%24filter=DistrictCode+eq+%27460800%27&%24select=DistrictCode,DistrictName,DistrictNumber
Again, how to configure the grid for this to happen?
I realize the source is available for Kendo UI, but I'm currently still on a trial version which doesn't include the source.
I think I've got a workable solution for this myself. I used an idea from this blog post:
http://community.dynamics.com/product/crm/crmtechnical/b/zhongchenzhoustipstricksandportaldevelopment/archive/2012/05/20/how-to-use-kendo-ui-datasource-kendo-ui-grid-with-dynamics-crm-2011-rest-endpoint.aspx
I attach an event handler the ajaxSend event, watch for my OData Service URL, and once such a request is detected, append the select column list to the URL. Here's the code:
$(document).ajaxSend(function (e, jqxhr, settings) {
if (settings.url.toLowerCase().indexOf("#Url.Content(dynDataSource.Url)".toLowerCase()) >= 0) {
settings.url += "&%24select=#requestColumnList";
}
});
Hope this helps. Still, if someone has got a better solution, I'd like to hear it.
I've also posted this question to Telerik forums: http://www.kendoui.com/forums/framework/data-source/configure-the-kendo-ui-datasource-so-it-would-issue-requests-only-for-specific-displayed-fields.aspx#2131604
I ran into a similar issue and implemented an approach that constructs an array of included columns in the transport's read data callback:
dataSource.transport.read.data = function(options) {
var data = {};
data["$select"] = columns.map(function(c) {
return c.field;
});
return data;
}
If you are using column menu and have hidden columns, you can also filter based on which columns are visible and force a grid refresh as columns are enabled.
columnShow: function (e) {
e.sender.dataSource.read();
}
I'm trying to do some data entry via a jQuery modal Dialog. I was hoping to use something like the following to gather up my data for posting.
data = $('#myDialog').serialize();
However this results in nothing. If I reference just the containing form instead myDialog then I get all the fields on the page except those within my dialog.
What's the best way to gather up form fields within a dialog for an AJAX submission?
The reason this is happening is that dialog is actually removing your elements and adding them at root level in the document body. This is done so that the dialog script can be confident in its positioning (to be sure that the data being dialog'd isn't contained, say, in a relatively positioned element). This means that your fields are in fact no longer contained in your form.
You can still get their values through accessing the individual fields by id (or anything like it), but if you want to use a handy serialize function, you're going to need to have a form within the dialog.
I've just run into exactly the same problem and since I had too many fields in my dialog to reference them individually, what I did was wrap the dialog into a temporary form, serialize it and append the result to my original form's serialized data before doing the ajax call:
function getDialogData(dialogId) {
var tempForm = document.createElement("form");
tempForm.id = "tempForm";
tempForm.innerHTML = $(dialogId).html();
document.appendChild(tempForm);
var dialogData = $("#tempForm").serialize();
document.removeChild(tempForm);
return dialogData;
}
function submitForm() {
var data = $("#MyForm").serialize();
var dialogData = getDialogData("#MyDialog");
data += "&" + dialogData;
$.ajax({
url: "MyPage.aspx",
type: "POST",
data: data,
dataType: "html",
success: function(html) {
MyCallback(html);
}
});
}
Form element inside dialog is removed from form and moved to the end of the body. You need something like this.
$("#dialog_id").dialog().parent().appendTo($("#form_id"));
jQuery("#test").dialog({
autoResize:true,
width:500,
height:600,
modal: true,
bgiframe: true,
}).parent().appendTo("form");
This works like charm