Hi,
sry got to this just now. You are correct sir! Thanks!
Zbynek
On Wed, Jan 11, 2017 at 1:47 PM, Sven Meier <s...@meiers.net> wrote:
> Hi,
>
> Im not sure I got this right but seems to me you still have to call
>> "User.findOne(id)" for each user
>>
>
> actually not, findOne() is called for the currently selected user only -
> that's the advantage.
>
> Regards
> Sven
>
>
> On 11.01.2017 13:16, Zbynek Vavros wrote:
>
>> Hi,
>>
>> Im not sure I got this right but seems to me you still have to call
>> "User.findOne(id)" for each user
>> that touches DB (big nope) or create a Map<ID, User> that doesn't sound
>> great either.
>>
>> Seems to me the best way is to fetch all users from DB and in
>> ChoiceRenderer just
>> iterate and get the correct one by ID...
>>
>> Zbynek
>>
>> On Wed, Jan 11, 2017 at 1:01 PM, Sven Meier <s...@meiers.net> wrote:
>>
>> Hi,
>>>
>>> as an alternative you can use a custom model instead:
>>>
>>> IModel<Long> target = ...;
>>>
>>> IModel<User> userModel = new IModel<User>() {
>>> public void setObject(User user) {
>>> target.set(user.getId());
>>> }
>>> public User getObject() {
>>> return User.findOne(target.get());
>>> }
>>> }
>>>
>>> Then your choice can just work on a user:
>>>
>>> DropDownChoice<User> usersDropDown = new DropDownChoice<>("userId",
>>> userModel, User.getUsers());
>>>
>>> Both approaches have advantages and disadvantages.
>>>
>>> Have fun
>>> Sven
>>>
>>>
>>>
>>> On 11.01.2017 11:38, Zbynek Vavros wrote:
>>>
>>> Hey,
>>>>
>>>> I have a DropDownChoice for list of users. I want to display user's name
>>>> but bind user's ID.
>>>> So far I have come to this (ugly) solution that can surely be improved:
>>>>
>>>> // create model with Long userId...
>>>> final DropDownChoice<Long> usersDropDown = new DropDownChoice<>(
>>>> "userId", Lists.transform(User.getUsers(), new
>>>> Function<User, Long>() {
>>>> @Nullable
>>>> @Override
>>>> public Long apply(@Nullable final User user) {
>>>> return user.getId();
>>>> }
>>>> }),
>>>> new ChoiceRenderer<Long>() {
>>>> @Override
>>>> public Object getDisplayValue(final Long id) {
>>>> return User.findOne(id);
>>>> }
>>>> }
>>>> );
>>>>
>>>> Thanks for any pointers.
>>>> Zbynek
>>>>
>>>>
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>>>
>
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