Question

An strange problem occourse on grails 1.2.4 on my machine only….

We are using an custom taglib which can be accessed from services via gspTagLibraryLookup-bean from AppContext.

On my local machine

    <my:span value="abc" title="${my.write(text:'123')}"/>

writes:

    123<span title="">abc</span> <!-- what i see -->
    <span title="123">abc</span> <!-- what my collegue see -->

my:write is defied as:

    def write = {out << attrs.text}

But: If i use return instead of out, the html generate what my collegue see.

Anyone know the difference?

Answer 1

Argument value for the title attribute is evaluated before passing it to <my:span>. So if you define write as {out << attrs.text}, and use it in <my:span>, the write function will write to out before span function does, and return nothing – so 123 will be written to output before <span>, and the title attribute will be empty.

If you define write as {return attrs.text}, its evaluation won’t write anything to out, and return 123 which will be inserted as value of title attribute.

Not sure why the first definition works on your collegue’s machine.