Всем привет!

Есть сущность:



Есть Freemarker шаблон с данными о пользователе, в частности возраст:



При сохранении данных происходит валидация данных, с последующим возвратом в шаблон при наличии ошибки и перезаполнением правильных полей.

По полю "age" получаю ошибку:
авторfreemarker.core.InvalidReferenceException: The following has evaluated to null or missing:
==> user.age [in template "registration.ftl" at line 80, column 82]

----
Tip: It's the step after the last dot that caused this error, not those before it.
----
Tip: If the failing expression is known to legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing</#if>. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)??
----

----
FTL stack trace ("~" means nesting-related):
- Failed at: ${user.age} [in template "registration.ftl" at line 80, column 80]
----

Если меняю тип "age" в сущности "User" на "String" всё работает.

Andy_OLAPMolasar,

А если попробовать заменить ${user.age} на ${user.age.value?html}, в порядке метода научного тыка.

FTL stack trace ("~" means nesting-related):
- Failed at: ${user.age.value?html} [in template "registration.ftl" at line 80, column 80]
----] with root cause

freemarker.core.InvalidReferenceException: The following has evaluated to null or missing:
==> user.age [in template "registration.ftl" at line 80, column 82]

Alexander A. SakДля null or missing другой синтаксис: ${user.age.value!"null or missing"}
https://freemarker.apache.org/docs/dgui_template_exp.html#dgui_template_exp_missing_default

авторfreemarker.core.InvalidReferenceException: The following has evaluated to null or missing:
==> user.age [in template "registration.ftl" at line 80, column 82]

----
Tip: It's the step after the last dot that caused this error, not those before it.
----
Tip: If the failing expression is known to legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing</#if>. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)??
----

----
FTL stack trace ("~" means nesting-related):
- Failed at: ${user.age.value!"null or missing"} [in template "registration.ftl" at line 80, column 80]
----

Alexander A. SakНу да. Копипаст - зло. "value" там лишнее конечно же. Нет такого свойства у Integer.
${user.age!"null or missing"}

Спасибо! Разобрался.