error on set attribute

papawo

i have query 1(featurelist) and query 2 (face);
if i choose query1, set attribute "entities" : entity,;
if i choose query2, set attribute"entities" : entity,

why do i get error when i choose query2? error is "@setAttribute: CANNOT_RESOLVE_ENTITIES"

Jake_Rosenfeld

You could do something like:

if (size(evaluateQuery(context, query2)) > 0)
{
     // set attribute on query 2
}
else
{
    // behavior if query 2 is empty
}

or even

try
{
    // set attribute on query 2
}
catch
{
    // behavior if query 2 is empty
}

I don't fully understand your question, but it should be simple to check whether query 2 has any content at the very beginning of your feature and just fail out if it doesn't.

Typically when we write our features internally, we use the following pattern to make sure Querys have actually been selected:

// In the precondition
annotation { "Name" : "Face to annotate" }
definition.query2 is Query;

// At the beginning of the feature body
if (size(evalauteQuery(context, definition.query2)) == 0)
{
    // First parameter is the error to throw, second parameter is the
    // field that should be highlighted red in the feature dialog.
    throw regenError("Select face to annotate.", ["query2"]);
}

papawo

i found out that if the other query is nothing , it gives me error.
so how should i do it then? user need to choose either of the 2 query.

papawo

solve it...i put else in the code...

Jake_Rosenfeld

You could do something like:

if (size(evaluateQuery(context, query2)) > 0)
{
     // set attribute on query 2
}
else
{
    // behavior if query 2 is empty
}

or even

try
{
    // set attribute on query 2
}
catch
{
    // behavior if query 2 is empty
}

I don't fully understand your question, but it should be simple to check whether query 2 has any content at the very beginning of your feature and just fail out if it doesn't.

Typically when we write our features internally, we use the following pattern to make sure Querys have actually been selected:

// In the precondition
annotation { "Name" : "Face to annotate" }
definition.query2 is Query;

// At the beginning of the feature body
if (size(evalauteQuery(context, definition.query2)) == 0)
{
    // First parameter is the error to throw, second parameter is the
    // field that should be highlighted red in the feature dialog.
    throw regenError("Select face to annotate.", ["query2"]);
}

papawo

im  getting an error..when i tried to use the last code.

papawo

im still getting error
precondition of setattribute failed (definition entities is query)

Jake_Rosenfeld

In the code you sent me, if `definition.userSelFaces` is false, the "entities" variable is never set, so you are passing undefined into `setAttribute`.

In cases like this, using `println` to print out the values of certain variables at certain points in your code can be a very useful debugging technique.