PersonalBlog | :memo: Nealyang personal blog | Blog library
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:memo: Nealyang personal blog
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QUESTION
I am writing simple blog web application using Spring MVC framework. I am willing to add DTO
layer to my app.
I decided to use ModelMapper framework for conversion from Entity
objects to DTO
objects used in my views.
I have just one problem.
On my main page, I am showing a list of posts on my blog. In my view, it's just list of Post
(Entity) objects. I want to change it to pass a list of PostDTO
objects to my view. Is there any way to map List
of Post
objects to List
of PostDTO
object with single method call?
I was thinking about writing converter that will convert this but I am not sure it's a good way to do it.
Also, I am using Lists
of Entities
in few more places like administrative panel or comment below every Post on my page.
Link to code of my app on GitHub repository: repository
...ANSWER
Answered 2018-Mar-10 at 15:14You can create util class:
QUESTION
I'm trying to setup dependency injection with Azure functions but for whatever reason I can't get the web jobs start up method to fire.
...ANSWER
Answered 2019-Apr-16 at 15:34As @Kirklarkin and @silent mentionned, Azure Functions v2 supports .NET Core whereas Azure Functions v1 supports .NET Framework. You can't run Azure Functions on any languages/runtime, there is a list of supported languages with the associated runtimes. The point of using Azure Functions is mostly to do serverless which means autoscaling, no infrastructure to manage, and paying resources per use.
Concerning dependency injection, it is not supported out-of-the box in Azure Functions at the time of writing but the team is currently implementing it and it's one of their top priorities so we should have it soon.
QUESTION
I successfully deployed my Spring app on Heroku, but when I try to test my app in action I receive
Error resolving template "/fragments/head.html", template might not exist or might not be accessible by any of the configured Template Resolvers (home:4)
Error.
It's odd, because locally my app works well without any problem.
Home.html code:
...ANSWER
Answered 2017-Dec-05 at 08:43You have invalid
th:replace
syntax. Should use
QUESTION
I am writing simple blog web app. What I want to do is load data from database, pass it to view into form inputs(not all, only those I want to be editable) edit them and pass them to database as update.
I am loading my Post from database, data correctly passes to edit form, even deugger see that Post has author setted, but after submitting this form, I got error that I cannot save entity while user_id is null. Why?
What I tried?
- ommitting default hibernate's lazyFetching by writing my own fetching query in repository
- adding non-editable text-field with athuor's username to edit form
My code:
Post model:
...ANSWER
Answered 2018-Jan-05 at 17:40Either your User
is null
or it is not persisted, leaving it's id
null
.
Make sure your User
is coming from the database, store it in the database before storing the Post
or make sure storing the Post
cascades to the User
entity.
Update based on your own answer and the debugging information in the comments
It looks like you are trying to keep the current user in the session and use it as a starting point which then gets updated from the fields included in the request.
The mistake is that the Model has by default only request scope.
The Post
you put there during the get request is gone once the post request arrives.
You should be able to fix that behavior by adding @SessionAttributes("post")
to your controller which makes the attribute session scoped, so it will still be there when you return.
You can read more about how @ModelAttribute
works and how it can be used in this excellent answer: https://stackoverflow.com/a/26916920/66686
QUESTION
I have problem with deploying my app on Heroku. Locally, everything works fine. I've added PostgreSQL to my heroku app, change configuration from mysql to posgresql in my yaml file and pushed app to heroku repository.
Logs I receive: Log
Entire app repository is available on my git hub page: Repository page, postgresql version branch
...ANSWER
Answered 2017-Nov-30 at 17:11Try build your app using maven to target: mvn clean install
The first step if you havent installed heroku cli in heroku your server:
QUESTION
I am writing form that lets user to change his password. Instead of passing User
object to form
, I am passing 3 empty Strings. Everything is okay, but when I am passing Submit
, Strings returns as empty. Is there any way to get String from forms in Spring without packaging them into objects like changePasswordForm
with 3 String fields?
My code:
Change password view:
...ANSWER
Answered 2017-Nov-28 at 16:36change th:field
to name
tag
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