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Posted to user@struts.apache.org by Antonio Sánchez <ad...@gmail.com> on 2014/05/08 09:27:38 UTC
ModelDriven and ParamsPrepareParams
Hello.
I have found problems using MD and PPP together, Struts2 complains (and
errors are displayed in view) that no setter method was found because at
first Params run, model is not yet instantiated. I am asking for which
of the following approaches is the most recommended one:
1. Define a custom interceptor stack MPPP (ModelParamsPrepareParams), so
model is instantiated before first params.
1.1. I have read [1] than moving ModelDriven would not be enough, but a
MPPMP is required. Is this right?
2. [my preferred one] Define a (redundant) id property in the action and
use it in the action and in the view instead of the id property of the
model. I mean, instead of:
@Override
public void prepare() throws Exception {
if (person.getId() != null) {
person = service.getPerson(person.getId());
} else {
person = new Person();
}
}
do
@Override
public void prepare() throws Exception {
if (personId != null) {
person = service.getPerson(personId);
} else {
person = new Person();
}
}
doing the same in the view, using personId appropriately instead of
(model) id.
3. Do not use ModelDriven.
Any other one? Is this issue documented?
Thanks.
[1] http://blog.mattsch.com/2011/04/14/things-discovered-in-struts-2/
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Re: ModelDriven and ParamsPrepareParams
Posted by Antonio Sánchez <ad...@gmail.com>.
Thanks!
El vie 16 may 2014 11:48:35 CEST, Lukasz Lenart escribió:
> Number 2 is also my favorite but it quite often depends ... on dev's
> preferences :D
>
> I remember that I wanted solve that case with ParametersInterceptors
> but there was a problem when and how to instantiate Model .
>
> 2014-05-08 9:27 GMT+02:00 Antonio Sánchez <ad...@gmail.com>:
>> Hello.
>>
>> I have found problems using MD and PPP together, Struts2 complains (and
>> errors are displayed in view) that no setter method was found because at
>> first Params run, model is not yet instantiated. I am asking for which of
>> the following approaches is the most recommended one:
>>
>> 1. Define a custom interceptor stack MPPP (ModelParamsPrepareParams), so
>> model is instantiated before first params.
>>
>> 1.1. I have read [1] than moving ModelDriven would not be enough, but a
>> MPPMP is required. Is this right?
>>
>> 2. [my preferred one] Define a (redundant) id property in the action and use
>> it in the action and in the view instead of the id property of the model. I
>> mean, instead of:
>>
>> @Override
>> public void prepare() throws Exception {
>> if (person.getId() != null) {
>> person = service.getPerson(person.getId());
>> } else {
>> person = new Person();
>> }
>> }
>>
>> do
>>
>> @Override
>> public void prepare() throws Exception {
>> if (personId != null) {
>> person = service.getPerson(personId);
>> } else {
>> person = new Person();
>> }
>> }
>>
>> doing the same in the view, using personId appropriately instead of (model)
>> id.
>>
>> 3. Do not use ModelDriven.
>>
>> Any other one? Is this issue documented?
>>
>> Thanks.
>>
>> [1] http://blog.mattsch.com/2011/04/14/things-discovered-in-struts-2/
>>
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>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>> For additional commands, e-mail: user-help@struts.apache.org
>>
>
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Re: ModelDriven and ParamsPrepareParams
Posted by Lukasz Lenart <lu...@apache.org>.
Number 2 is also my favorite but it quite often depends ... on dev's
preferences :D
I remember that I wanted solve that case with ParametersInterceptors
but there was a problem when and how to instantiate Model .
2014-05-08 9:27 GMT+02:00 Antonio Sánchez <ad...@gmail.com>:
> Hello.
>
> I have found problems using MD and PPP together, Struts2 complains (and
> errors are displayed in view) that no setter method was found because at
> first Params run, model is not yet instantiated. I am asking for which of
> the following approaches is the most recommended one:
>
> 1. Define a custom interceptor stack MPPP (ModelParamsPrepareParams), so
> model is instantiated before first params.
>
> 1.1. I have read [1] than moving ModelDriven would not be enough, but a
> MPPMP is required. Is this right?
>
> 2. [my preferred one] Define a (redundant) id property in the action and use
> it in the action and in the view instead of the id property of the model. I
> mean, instead of:
>
> @Override
> public void prepare() throws Exception {
> if (person.getId() != null) {
> person = service.getPerson(person.getId());
> } else {
> person = new Person();
> }
> }
>
> do
>
> @Override
> public void prepare() throws Exception {
> if (personId != null) {
> person = service.getPerson(personId);
> } else {
> person = new Person();
> }
> }
>
> doing the same in the view, using personId appropriately instead of (model)
> id.
>
> 3. Do not use ModelDriven.
>
> Any other one? Is this issue documented?
>
> Thanks.
>
> [1] http://blog.mattsch.com/2011/04/14/things-discovered-in-struts-2/
>
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> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
> For additional commands, e-mail: user-help@struts.apache.org
>
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