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POHow to use jQuery when function with more postJSON queries?
 

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  1. POHow to use jQuery when function with more postJSON queries?
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    <p>I have a problem at work: I have a section of installations which are dependent on servers. I want to do this: When a user deletes a server, it loops through installations collection and deletes all dependent installations. For that I use jQuery 'when' function, which is said to wait for a response from the server and then move on to 'then' function. It works flawlessly when there is only one dependent installation. A problem occurs when there are more installations, however, because it moves to the 'then' function immediately after receiving a JSON response.</p> <p>The question is: How do I make 'when' function wait for all server responses? Eg. I send out three delete requests through $.postJSON and want to move on <em>after</em> I get all three responses. If it's not possible with 'when', what should I use to make it happen? If it helps, I maintain all my entities collections with KnockoutJS. Thanks!</p> <p>EDIT: I have it like this:</p> <pre><code>$.when(DeleteDependentInstallations()) .then (function() { ... }); </code></pre> <p>DeleteDependentInstallations looks like (pseudocode):</p> <pre><code>Search the installations collection; If installation.ID equals server.InstallationID { Add to dependent installations collection; } Repeat until the whole collection is searched; for (i = 0; i &lt; dependentInstallations.length; i++) { DeleteInstallation(dependentInstallations[i]); } </code></pre> <p>DeleteInstallations is a simple function using $.postJSON function.</p> <p>The problem is the .then function executes immediately after the first JSON response.</p>
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    1. USFilip Vondrášek
    1. USFilip Vondrášek
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    1. COCode. Example. Whathaveyoutried.
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      1. USPitaJ
    2. CO`$.when()` waits for either *all resolves* **or** *the first reject*. This questions seems to be a duplicate. I've made a modified version of `$.when()` and there's a couple of other answers over at **[jQuery.when - Callback for when ALL Deferreds are no long 'unresolved' (either resolved or rejected)?](http://stackoverflow.com/questions/5824615/jquery-when-callback-for-when-all-deferreds-are-no-long-unresolved-either-r)**
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      1. POHow to use jQuery when function with more postJSON queries?
      1. UShippietrail
    3. COI added a pseudocode of how I do it. I think this case is a bit different that the one at the link you posted, hippietrail.
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