number comparison in IBM Watson Assistant

Question

I am trying to build a BMI calculator inside Watson but it seems like Watson is not supporting number comparison when you use the "Multiple conditioned responses".

<? ($weight /  ($height * $height) ) < 18.5  ?>

This code will throw an error:

SpelParseException when evaluating dialog node ID [response_8_1624288200413]. Condition [<? ($weight / ($height * $height) ) < 18.5 ?>] could not be parsed. Check the syntax of the expression. SpEL syntax error: Expression [<? ($weight / ($height * $height) ) < 18.5 ?>] converted to [<? (context['weight'] / (context['height'] * context['height']) ) < 18.5 ?>] at position 0: EL1070E: Problem parsing left operand

score 1 · Accepted Answer · answered Jun 21 '21 at 17:06

1

Your example works for me. I can also confirm that IBM Watson Assistant can compare numbers and has other support for math expressions and number processing.

This is my response text:

This is: <? ($weight / ($height*$height)) < 18.5 ?>

I set values for weight and height in Manage Context in the "Try it". Depending on the values, it returns either

This is: true

or

This is: false

Have you set any values during your tests?

answered Jun 21 '21 at 17:06

data_henrik

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Sorry I have this problem under "Multiple conditioned responses". I tried to use this as a condition but it failed – Shuning Sun Jun 21 '21 at 17:48
Could you first assign the result to a variable, then use that variable as condition? – data_henrik Jun 21 '21 at 19:36
I already found the reason: You don't need ?> in "Multiple conditioned responses". Thank you for helping me! – Shuning Sun Jun 21 '21 at 19:57

number comparison in IBM Watson Assistant

1 Answers1