check if value exists in json array

Question

I want to check via js/jquery if a value exits in a json array:

[{"pathway_action_fk":"1"},{"pathway_action_fk":"2"},{"pathway_action_fk":"4"}]

I have tried without success:

 $.ajax({
       type: "POST",
       url: "scripts/get_actions_allowed.php",
       data: 'pathway=' + pathway_pk,
      dataType: "json",
       success: function(returnedData) {
if ($.inArray('1', returnedData)){
    $('#script').addClass('active');
}...

If I put in after success:

alert(returnedData);

I get[object Object],[object Object] which is the correct number of objects that should be returned. Removing json as dataType shows the correct values...

aroth · Accepted Answer · 2013-08-05 04:52:54Z

4

Your array contains JSON objects. So you need to look inside of each object to see if its field has the desired value (or at least, that's what I gather you're trying to do judging by your code).

So perhaps something along the lines of:

$(returnedData).each(function() {
    if (this.pathway_action_fk == 1) {
        $('#script').addClass('active');
    }
});

Example: http://jsfiddle.net/qvsbT/

answered Aug 5, 2013 at 4:52

aroth

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Rowman Pirce · Accepted Answer · 2013-08-05 05:05:14Z

1

$.ajax({
    type: "POST",
    url: "scripts/get_actions_allowed.php",
    data: 'pathway=' + pathway_pk,
    dataType: "json",
    success: function(returnedData)
    {
        for(var i=0, max=returnedData.length; i<max; i++)
        {
            if(returnedData[i].pathwy_action_fk==='1')
            {
                $('#script').addClass('active');
                break;
            }
        }
    }
})

edited Aug 5, 2013 at 5:05

answered Aug 5, 2013 at 4:54

Rowman Pirce

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2 Comments

Barmar Over a year ago

This is just like the original code, you're not looking in the pathway_action_fk property.

Rowman Pirce Over a year ago

Ouch, yeah, sorry. Updated.

Barmar · Accepted Answer · 2013-08-05 05:11:27Z

1

The elements of the array are objects, not strings. The values you want to check are the pathway_action_fk properties of those objects. So you have to drill down before checking.

if ($.inArray('1', returnedData.map(function(x) {
    return x.pathway_action_fk;
})) != -1);

Also, you need to compare the result of $.inArray with -1 -- it returns the found element's index, which can be 0, not a boolean.

edited Aug 5, 2013 at 5:11

answered Aug 5, 2013 at 4:52

Barmar

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1 Comment

IlludiumPu36 Over a year ago

Thanks for this...tried the code but couldn't get it working, though that is probably my failure to implement it properly.

Mrunal shah · Accepted Answer · 2019-01-25 10:43:59Z

0

  var JSN = 
[
    {
        "email": "[email protected]"
    }, 
    {
        "email": "[email protected]"
    },
    {
        "email": "[email protected]"
    },
    {
        "email": "[email protected]"
    }
];
// var hasMatch =false;
$(JSN).each(function() {
    if (this.email == "[email protected]") {
        alert("found:  " + JSON.stringify(this));
    }else{
        alert('Not Found');

    }

});

Example: https://jsfiddle.net/wfh9ur1j/5/

edited Jan 25, 2019 at 10:43

answered Jan 25, 2019 at 10:14

Mrunal shah

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