How to Assign a variable after running Run keyword If - else ?

Question

I am trying to assign a variable - body ,depending on the status of another variable phonenumber_id. If the phonenumber_id is NULL, body gets assigned False.
But it doesnt seem to be working. It works only if he phonenumber_id is not NULL.

${body}=    Run keyword if  '${phonenumber_id}'!='NULL'     Set variable    TRUE
...         Else            Set Variable    FALSE

Not sure what i am doing wrong.

What does "not working" mean? Do you get an error, or is it always setting it to the same value no matter what ${phonenumber_id} is? Also, are you wanting to check against the string "NULL", or against the python value None? — Bryan Oakley
– Bryan Oakley, Commented Apr 2, 2015 at 23:19
When the first condition was true, it was assigning ${body} with this Set variable TRUE ... Else Set Variable FALSE — velapanur
– velapanur, Commented Apr 3, 2015 at 22:52

ILostMySpoon · Accepted Answer · 2015-04-03 00:59:01Z

14

The keyword Set Variable If will set a variable based on a given condition

${body}=    Set Variable If    '${phonenumer_id} != 'NULL'
...    ${True}    ${False}

answered Apr 3, 2015 at 0:59

ILostMySpoon

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1 Comment

jezrael Over a year ago

But if edit your answer, I remove downvote with joy.

Community · Accepted Answer · 2017-05-23 11:54:30Z

You got it almost right - just mistyped the ELSE - it must be in capital letters, to be considered a part of the Run Keyword If. So in your particular case, it should've been:

${body}=    Run keyword if  '${phonenumber_id}'!='NULL'     Set variable    TRUE
...         ELSE            Set Variable    FALSE

For the simple case of just setting a new constant value though, @ILostMySpoon answer is good enough - and more "readable".

In general, for someone stumbling on this post, the Run Keyword If combined with ELSE Set Variable is a very powerful construct to set/change a variable - based on the fact that it not only runs a keyword(s) conditionally, but also propagates its return values back to the stack.

Consider this example:

${var}=    Run Keyword If    ${bool condition}   Do Some Action Returning A Value    
           ...    ELSE    Set Variable    ${var}

In it {var} will be set to the return value of Do Some Action Returning A Value only if ${bool condition} evaluates to true, and will keep its old value otherwise.

Another artifical but less abstract example:

    ${value}=    Run Keyword If    ${should be int}     Convert To Integer   ${value}
                 ...    ELSE IF    ${should be float}   Convert To Number    ${value}
                 ...    ELSE    Set Variable    ${value}

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