Grails

Error during evaluate method in a GSP page

Details

  • Type: Bug Bug
  • Status: Open Open
  • Priority: Major Major
  • Resolution: Unresolved
  • Affects Version/s: 2.0-RC1
  • Fix Version/s: 2.3-M2
  • Component/s: View technologies
  • Labels:
  • Environment:
    OS: Win XP SP3
    IDE: Netbeans 7.0.1/Tomcat 7.0.1
    Grails: 2.0.0.RC1

Description

Hi,

in our project "myProject" we have found a regression migrating it from Grails 1.3.6 to Grails 2.0.0.RC1.
The issue occurs during the "evaluate" method in a GSP page. More in detail, we use it in the g:select tag below:

<g:select name="${reportFieldInstance.code}"
   noSelection="${['null':'']}"
   from="${evaluate(reportFieldInstance.fromClause)}"
   optionKey="${reportFieldInstance.optionKey}"/>

reportFieldInstance.fromClause is a String that we evaluate at runtime in order to pass the list of a domain class dinamically.
This works fine with version 1.3.6 but in 2.0.0 Release Candidate 1 we are facing the following error:

| Error 2011-11-09 11:08:16,268 ["http-bio-8080"-exec-1] ERROR errors.GrailsExceptionResolver  - GroovyCastException occurred when processing request: [GET] /myProject/report/print/2
Cannot cast object 'com.bla.bla.bla.myProject.Group.list()' with class 'java.lang.String' to class 'java.io.File'. Stacktrace follows:
Message: Error processing GroovyPageView: Error executing tag <g:form>: Error evaluating expression [evaluate(reportFieldInstance.fromClause)] on line [69]: Cannot cast object 'com.bla.bla.bla.myProject.Group.list()' with class 'java.lang.String' to class 'java.io.File'
   Line | Method
->>  93 | runTask in \grails-app\views\report\print.gsp
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 

Caused by GrailsTagException: Error executing tag <g:form>: Error evaluating expression [evaluate(reportFieldInstance.fromClause)] on line [69]: Cannot cast object 'com.bla.bla.bla.myProject.Group.list()' with class 'java.lang.String' to class 'java.io.File'
->>  93 | doCall  in C:/svn/CIBIT-LAPPS/groovy/NetBeansProjects/myProject/grails-app/views/report/print.gsp
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 

Caused by GroovyPagesException: Error evaluating expression [evaluate(reportFieldInstance.fromClause)] on line [69]: Cannot cast object 'com.bla.bla.bla.myProject.Group.list()' with class 'java.lang.String' to class 'java.io.File'
->>  69 | doCall  in C:/svn/CIBIT-LAPPS/groovy/NetBeansProjects/myProject/grails-app/views/report/print.gsp
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 

Caused by GroovyCastException: Cannot cast object 'com.bla.bla.bla.myProject.Group.list()' with class 'java.lang.String' to class 'java.io.File'
->>  95 | doCall  in C__svn_CIBIT_LAPPS_groovy_NetBeansProjects_myProject_grails_app_views_report_print_gsp$_run_closure2_closure20_closure55
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
|   121 | doCall  in C__svn_CIBIT_LAPPS_groovy_NetBeansProjects_myProject_grails_app_views_report_print_gsp$_run_closure2
|   124 | run . . in C__svn_CIBIT_LAPPS_groovy_NetBeansProjects_myProject_grails_app_views_report_print_gsp
|   886 | runTask in java.util.concurrent.ThreadPoolExecutor$Worker
|   908 | run . . in     ''
^   662 | run     in java.lang.Thread

Replacing the evaluate(string) with the string itself the GSP page works fine:

<g:select name="${reportFieldInstance.code}"
   noSelection="${['null':'']}"
   from="${com.bla.bla.bla.myProject.Group.list()}"
   optionKey="${reportFieldInstance.optionKey}"/>

So the issue seems to be related to the way Grails perform the evaluate method in a GSP.

Thanks and best regards

Activity

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Lari Hotari added a comment -

The content of groovy.lang.Script is:

    public Object evaluate(String expression) throws CompilationFailedException {
        GroovyShell shell = new GroovyShell(getClass().getClassLoader(), binding);
        return shell.evaluate(expression);
    }

as a workaround you could try $

{new Script(binding).evaluate(reportFieldInstance.fromClause)}

.

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Lari Hotari added a comment - The content of groovy.lang.Script is: public Object evaluate( String expression) throws CompilationFailedException { GroovyShell shell = new GroovyShell(getClass().getClassLoader(), binding); return shell.evaluate(expression); } as a workaround you could try $ {new Script(binding).evaluate(reportFieldInstance.fromClause)} .

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  • Assignee:
    Unassigned
    Reporter:
    Frankie
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