freemarker.core.NonMethodException: [... Exception message was already printed; see it above ...]

相关代码

${column.nullableString?string("N","Y")?right_pad(5," ")}

错误信息

五月 11, 2017 5:09:23 下午 freemarker.log._JULLoggerFactory$JULLogger error
严重: Error executing FreeMarker template
FreeMarker template error:
For "...(...)" callee: Expected a method, but this has evaluated to a string (wrapper: f.t.SimpleScalar):
==> column.nullableString?string  [in template "baseTemplate/java_src/${basepackage_dir}/interfaceDoc/${className}Doc.html" at line 101, column 86]

----
FTL stack trace ("~" means nesting-related):
	- Failed at: ${column.nullableString?string("N", "...  [in template "baseTemplate/java_src/${basepackage_dir}/interfaceDoc/${className}Doc.html" at line 101, column 84]
----

Java stack trace (for programmers):
----
freemarker.core.NonMethodException: [... Exception message was already printed; see it above ...]
	at freemarker.core.MethodCall._eval(MethodCall.java:85)
	at freemarker.core.Expression.eval(Expression.java:81)
	at freemarker.core.Expression.evalAndCoerceToStringOrUnsupportedMarkup(Expression.java:107)
	at freemarker.core.BuiltInForString.getTargetString(BuiltInForString.java:34)
	at freemarker.core.BuiltInForString._eval(BuiltInForString.java:29)
	at freemarker.core.Expression.eval(Expression.java:81)
	at freemarker.core.MethodCall._eval(MethodCall.java:58)
	at freemarker.core.Expression.eval(Expression.java:81)
	at freemarker.core.DollarVariable.calculateInterpolatedStringOrMarkup(DollarVariable.java:96)
	at freemarker.core.DollarVariable.accept(DollarVariable.java:59)
	at freemarker.core.Environment.visit(Environment.java:362)
	at freemarker.core.IteratorBlock$IterationContext.executedNestedContentForCollOrSeqListing(IteratorBlock.java:315)
	at freemarker.core.IteratorBlock$IterationContext.executeNestedContent(IteratorBlock.java:271)
	at freemarker.core.IteratorBlock$IterationContext.accept(IteratorBlock.java:242)
	at freemarker.core.Environment.visitIteratorBlock(Environment.java:595)
	at freemarker.core.IteratorBlock.acceptWithResult(IteratorBlock.java:107)
	at freemarker.core.IteratorBlock.accept(IteratorBlock.java:93)
	at freemarker.core.Environment.visit(Environment.java:326)
	at freemarker.core.Environment.visit(Environment.java:332)
	at freemarker.core.Environment.process(Environment.java:305)
	at freemarker.template.Template.process(Template.java:378)
	at cn.org.rapid_framework.generator.Generator.saveNewOutputFileContent(Generator.java:233)
	at cn.org.rapid_framework.generator.Generator.generateNewFileOrInsertIntoFile(Generator.java:167)
	at cn.org.rapid_framework.generator.Generator.generateByModelProvider(Generator.java:126)
	at cn.org.rapid_framework.generator.Generator.generateByModelProvider(Generator.java:83)
	at cn.org.rapid_framework.generator.GeneratorFacade.generateByTable(GeneratorFacade.java:117)
	at cn.org.rapid_framework.generator.GeneratorMain.main(GeneratorMain.java:76)

Exception in thread "main" java.lang.RuntimeException: generate 'Database Table:equipment to ClassName:Equipment' oucur error,template is:baseTemplate/java_src/${basepackage_dir}/interfaceDoc/${className}Doc.html
	at cn.org.rapid_framework.generator.Generator.generateByModelProvider(Generator.java:128)
	at cn.org.rapid_framework.generator.Generator.generateByModelProvider(Generator.java:83)
	at cn.org.rapid_framework.generator.GeneratorFacade.generateByTable(GeneratorFacade.java:117)
	at cn.org.rapid_framework.generator.GeneratorMain.main(GeneratorMain.java:76)
Caused by: freemarker.core.NonMethodException: For "...(...)" callee: Expected a method, but this has evaluated to a string (wrapper: f.t.SimpleScalar):
==> column.nullableString?string  [in template "baseTemplate/java_src/${basepackage_dir}/interfaceDoc/${className}Doc.html" at line 101, column 86]

----
FTL stack trace ("~" means nesting-related):
	- Failed at: ${column.nullableString?string("N", "...  [in template "baseTemplate/java_src/${basepackage_dir}/interfaceDoc/${className}Doc.html" at line 101, column 84]
----
	at freemarker.core.MethodCall._eval(MethodCall.java:85)
	at freemarker.core.Expression.eval(Expression.java:81)
	at freemarker.core.Expression.evalAndCoerceToStringOrUnsupportedMarkup(Expression.java:107)
	at freemarker.core.BuiltInForString.getTargetString(BuiltInForString.java:34)
	at freemarker.core.BuiltInForString._eval(BuiltInForString.java:29)
	at freemarker.core.Expression.eval(Expression.java:81)
	at freemarker.core.MethodCall._eval(MethodCall.java:58)
	at freemarker.core.Expression.eval(Expression.java:81)
	at freemarker.core.DollarVariable.calculateInterpolatedStringOrMarkup(DollarVariable.java:96)
	at freemarker.core.DollarVariable.accept(DollarVariable.java:59)
	at freemarker.core.Environment.visit(Environment.java:362)
	at freemarker.core.IteratorBlock$IterationContext.executedNestedContentForCollOrSeqListing(IteratorBlock.java:315)
	at freemarker.core.IteratorBlock$IterationContext.executeNestedContent(IteratorBlock.java:271)
	at freemarker.core.IteratorBlock$IterationContext.accept(IteratorBlock.java:242)
	at freemarker.core.Environment.visitIteratorBlock(Environment.java:595)
	at freemarker.core.IteratorBlock.acceptWithResult(IteratorBlock.java:107)
	at freemarker.core.IteratorBlock.accept(IteratorBlock.java:93)
	at freemarker.core.Environment.visit(Environment.java:326)
	at freemarker.core.Environment.visit(Environment.java:332)
	at freemarker.core.Environment.process(Environment.java:305)
	at freemarker.template.Template.process(Template.java:378)
	at cn.org.rapid_framework.generator.Generator.saveNewOutputFileContent(Generator.java:233)
	at cn.org.rapid_framework.generator.Generator.generateNewFileOrInsertIntoFile(Generator.java:167)
	at cn.org.rapid_framework.generator.Generator.generateByModelProvider(Generator.java:126)
	... 3 more

必须使用单引号，双引号都不行；

${column.nullable?string('N','Y')?right_pad(5," ")}