🔥Creating API of Getting all posts of category | get all posts of user | Backend API Course

[@nilesh_rode_96k]

Sir please make video on angular 12 Spring boot rest API MySQL database. Get multiple images from database through rest API and display angular.

[@maheshchandane7197]

Durgesh bhai aap genius ho❤ India me Spring ke badshah

[@rahul-sinha]

Durgesh Sir, please do include proper THUMBNAIL for each videos as well. Thanks 👍

[@dnyaneshwarbandgar5338]

Great sir 👌👌

[@AbhishekKumar-hy7fb]

Sir plz implement all services in Microservice manners

[@sunnysingh7854]

The assignments which you gave are done

[@Vithal_Nivargi]

6:34 I have created for the User....

[@pradeepsharma5711]

As you said to complete the suggested method without your help. So i did. Name: Pradeep Sharma Method completed from my end.

[@vishalgoel7661]

Sir in postman your url starts with http .What should we do so that I can use https ? I have a very little idea of https like "we need a certificate and write code for it's validation ." Sir please make video on this topic as well .

[@himanshugoyal9581]

Hello Sir, Thanx for helping all students like me with all these types of contents. Further, i have completed APIs of getOnePost(postId) and getAllPost(). Please keep supporting us with your content.

[@abbasmastan7793]

Sir thank you for this course but please sir implements multilangual work in this app like urdu and english this will be my final year project

[@lordgreat6051]

coding can already be so annoying sometimes like forgetting to add autowired annotation and wondering for an hour why im getting null on request and then these youtube ads mess with my brain ugh

[@mohammadsaddanhussain7342]

Hello Sir, I am getting null value while retrieving data from database using getPostByUser or getPostCategory. { "postTitle": null, "postContent": null, "postImageName": null, "postAddedDate": null, "category": null, "user": null }

[@hashmisaddam7078]

Same question

[@vatsalvasoya566]

@@hashmisaddam7078 same question did u got solution to it?!

[@sujayjeppu2320]

public List getAllPostsByCategory(Long categoryId) { Category category = this.categoryRepo.findById(categoryId).orElseThrow(() -> new ResourceNotFoundException("Category", "Id", categoryId)); List allPostsByCategory = this.postRepo.findByCategory(category); return extractAllPostDTOs(allPostsByCategory); } public List getAllPostsByUser(Long userId) { User user = this.userRepo.findById(userId).orElseThrow(() -> new ResourceNotFoundException("User", "Id", userId)); List allPostsByUser = this.postRepo.findByUser(user); return extractAllPostDTOs(allPostsByUser); } private List extractAllPostDTOs(List allPostsByCategory) { List allPostDTOByCategory = allPostsByCategory .stream() .map( post -> { UserDTO postUserDTO = this.modelMapper.map(post.getUser(), UserDTO.class); CategoryDTO postCategoryDTO = this.modelMapper.map(post.getCategory(), CategoryDTO.class); PostDTO postDTO = this.modelMapper.map(post, PostDTO.class); postDTO.setUserDTO(postUserDTO); postDTO.setCategoryDTO(postCategoryDTO); return postDTO; }) .collect(Collectors.toList()); return allPostDTOByCategory; }

[@gauravvashistha8383]

You get any solution of this

[@chander10980]

@@gauravvashistha8383 Wrong one----posts. stream. map( (post) -> this. modelmapper.map(posts, PostDto. Class)). tolitst (Collectors.toList()) ; Correct one -- posts. stream. map( (x) -> this. modelmapper.map(x, PostDto. Class)). tolitst (Collectors.toList()) ;

[@jigarpatel3614]

Nice explanation. thanks a lot for sharing this knowledge with us without any cost.

[@sarveshm-rd6zp]

Hi sir when i am run postman i am getting output like this please replay me what happend "title": null, "content": null, "imageName": null, "addedDate": null, "category": null, "user": null

[@SachinSavita-dv7yj]

me too, what to do now?

[@Javed_Khan_.]

@@SachinSavita-dv7yj watch at 15:30

[@KashyapSharma0]

@@Javed_Khan_. Thanks

[@gauravbansalkec]

Can't I fetch the list of posts from category object obtained directly rather than calling post repo for it as we have stored all posts of a category in the category model also ???

[@shameersharif7680]

Bro you look like a music director in south his name is S.S.Thaman….you look exact😳

[@sheetalrai3325]

I'm getting null for the category and user details while printing all the posts Any help is much appreciated

[@travelwithannus]

Same error.... Have you find any solution ?

[@s.prabin]

@@travelwithannus copy this code @Override public List getAllPostByCategory(Integer cid) { Category cat = this.categoryRepo.findById(cid) .orElseThrow(() -> new ResourceNotFoundException("Category", "Category id", cid)); List posts = this.postRepo.findByCategory(cat); List tempDto = posts.stream().map((post) -> this.modelMapper.map(post, PostDto.class)) .collect(Collectors.toList()); return tempDto; } a small typo leads to that error(i.e. in lambda expression while modelmapping, we have to write lambda expression post instead of List posts)

[@vijayrajsingh2348]

Hi Sir, I am getting null values for users and category when I am trying to create Post. public PostDto createPost(PostDto postDto,Integer uid, Integer cid) { Post post = toPost(postDto); // reading remaining data post.setImageName("default.png"); post.setDate(new Date()); // set users User userById = userRepo.findById(uid).orElseThrow(()-> new ResourceNotFoundException("user","id",uid)); post.setUserss(userById); // set category Category categoryById = catRepos.findById(cid).orElseThrow(()->new ResourceNotFoundException("category","id",cid)); post.setCategoryy(categoryById); Post savedPost = repos.save(post); System.out.println("user is====" +savedPost.getUserss().toString()); System.out.println("category is ==>"+ savedPost.getCategoryy().toString()); System.out.println("post is:"+ savedPost); return toPostDto(savedPost); } // conversion of post dto to post entity public Post toPost(PostDto postDto) { Post post = modelMapper.map(postDto, Post.class); return post; } // conversion of post entity to post dto public PostDto toPostDto(Post post) { PostDto postDto = modelMapper.map(post, PostDto.class); return postDto; }

[@travelwithannus]

Same error... Have you found any solution ?

[@challengefitness-gz9bo]

@@travelwithannus hello same problem hvae you find any solution

[@s.prabin]

@@challengefitness-gz9bo @Override public List getAllPostByCategory(Integer cid) { Category cat = this.categoryRepo.findById(cid) .orElseThrow(() -> new ResourceNotFoundException("Category", "Category id", cid)); List posts = this.postRepo.findByCategory(cat); List tempDto = posts.stream().map((post) -> this.modelMapper.map(post, PostDto.class)) .collect(Collectors.toList()); return tempDto; } copy this code a small typo leads to that problem

[@samartajshaikh2601]

great practice tutorial

[@ManishKumar-zb2qx]

i did

[@vatsalvasoya566]

"title": null, "content": null, "imageName": null, "addedDate": null, "category": null, "user": null }, when i created get all posts by user i get these can anyone help......

[@s.prabin]

@Override public List getAllPostByCategory(Integer cid) { Category cat = this.categoryRepo.findById(cid) .orElseThrow(() -> new ResourceNotFoundException("Category", "Category id", cid)); List posts = this.postRepo.findByCategory(cat); List tempDto = posts.stream().map((post) -> this.modelMapper.map(post, PostDto.class)) .collect(Collectors.toList()); return tempDto; } copy this code

[@mrrishiraj88]

🙏👍

[@rahul-sinha]

💥Sir Please *upload this project source-code on your website* -Thanks 🤗💖💞💥

[@TheHimanshuSharmaYT]

Katakuri

[@yashgupta-qn6qg]

bhai source code bhi do n

[@artworkbysomrita2062]

After defining these 2 extra methods inside PostsRepositories public interface PostRepositories extends JpaRepository{ List findAllPostsByUser(Users users); List findAllPostsByCategory(Category category); } getting this error: Error starting ApplicationContext. To display the condition evaluation report re-run your application with 'debug' enabled. 2023-05-03T11:24:55.605+05:30 ERROR 17836 --- [ restartedMain] o.s.boot.SpringApplication  : Application run failed org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'postController': Unsatisfied dependency expressed through field 'postServ': Error creating bean with name 'postsServiceImpl': Unsatisfied dependency expressed through field 'postRepo': Error creating bean with name 'postRepositories' defined in com.somrita.blog.repositories.PostRepositories defined in @EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Could not create query for public abstract java.util.List com.somrita.blog.repositories.PostRepositories.findAllPostsByUser(com.somrita.blog.models.Users); Reason: Failed to create query for method public abstract java.util.List com.somrita.blog.repositories.PostRepositories.findAllPostsByUser(com.somrita.blog.models.Users); No property 'user' found for type 'Posts' Did you mean ''users'' at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:713) ~[spring-beans-6.0.8.jar:6.0.8] at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:693) ~[spring-beans-6.0.8.jar:6.0.8] at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:133) ~[spring-beans-6.0.8.jar:6.0.8] at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:482) ~[spring-beans-6.0.8.jar:6.0.8] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1416) ~[spring-beans-6.0.8.jar:6.0.8] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:597) ~[spring-beans-6.0.8.jar:6.0.8] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:520) ~[spring-beans-6.0.8.jar:6.0.8] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:326) ~[spring-beans-6.0.8.jar:6.0.8] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-6.0.8.jar:6.0.8] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:324) ~[spring-beans-6.0.8.jar:6.0.8] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-6.0.8.jar:6.0.8] at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:973) ~[spring-beans-6.0.8.jar:6.0.8] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:917) ~[spring-context-6.0.8.jar:6.

[@dhavalhatzade6292]

while creating "findByCategory" method in PostRepo, I'm getting org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'postServiceImpl': Unsatisfied dependency expressed through field 'postRepo'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'postRepo' error Can someone help me fix this.

[@vijik2988]

please autowire all services and repository

[@sunnysingh7854]

In the repo Interface, check whether you are giving the correct names for the methods. Hope it helps. List findByUser(User user); List findByCategory(Category category);

[@vasuaggarwal9883]

in your PostServiceImpl add the service annotation@@sunnysingh7854