1

I've a lookup additional column and alerting its value in Javascript as:

var oPicture = oListItem.get_item("Image_x003A_People").get_lookupValue()

If I dont add any data in the column it errors, how can this be tested to prevent the error.

Thanks

1 Answer 1

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Use an IF condition to check whether lookup field contains value or not. Example:

if (oListItem.get_item('Image_x003A_People')) {
    alert(oListItem.get_item('Image_x003A_People').get_lookupValue());
}   
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  • Did you use a SharePoint tool to work this out? Feb 4, 2015 at 10:50
  • @OrangeJuice, this is a simple JavaScript technique. I did however, test it and it worked perfectly. Feb 4, 2015 at 10:59
  • @OrangeJuice this works because oListItem.get_item('Image_x003A_People') will return null if no value has been assigned -- in JavaScript, null is considered a "falsey" value and will evaluate to false when evaluated inside of a conditional statement... you can read more about this on SO at stackoverflow.com/questions/19839952/…
    – John-M
    Feb 4, 2015 at 21:14

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