Hi, I have a rule input called ri!state which gets its value from a query r

aswinb over 10 years ago

Hi,
I have a rule input called ri!state which gets its value from a query rule. Then I am passing this rule input to the value and saveInto fields of a textbox like this:

a!textField(
label:"State",
value:ri!state,
saveInto:ri!state)

I am getting an error called "Cannot save type List of Text into Text". The only way I found to solve this problem is by passing null to saveInto field. Is there a way around to solve this problem and why I am getting this error?
thanks...

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0 Eduardo Fuentes
Appian Employee
over 10 years ago

Query rules return an array of items; even if there's only result the return type will be a list of items with a single item inside.

If you are expecting a single value use the index() function to retrieve the first value of the query rule's array.
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0 aswinb over 10 years ago

I tried doing the index function but the error still exists if I try to use the same rule input which receives the value and try to store into it using savInto. Don't know why this is happening but usually everybody saves into the same variable that was used to recieve the value from the qurery rule.
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0 Eduardo Fuentes
Appian Employee
over 10 years ago

May I see the syntax of the whole expression when using the index() function?
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0 Eduardo Fuentes
Appian Employee
over 10 years ago

Is it related to your finding from forum.appian.com/.../e-104568 ?
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0 aswinb over 10 years ago

I solved the problem. You see we cannot use a query rule directly to store value into a local variable or a rule input. You have to first use the query rule inside an expression rule and then use that expression rule to populate your rule input or local variable. This solved my problem. Thanks for your concern though.
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0 aswinb over 10 years ago

sorry yes it is related to my finding from the link that you mentioned.
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