Jpa query returns null spring. public void delete(T entity) {. I'm using Spring JPA Query By Example to allow dynamic filters. new com. answer = answer; this. By default, for all methods that return a value, a mock will return either null, a primitive/primitive wrapper value, or an empty collection, as appropriate. As of Spring Data 2. But my results is that the List is being set Feb 7, 2014 · As of Spring Data JPA release 1. @Query("SELECT e. sequence) + 1 from ProductImage pi where pi. mypackage. Our query method will return the found basic type or null. myDTO(recipientName, SUM(p. customer_name AS customerName, ". The main difference between findById () and getReferenceById () is when they load the entities into the persistence context. I have tried to following to include the NULL values but it didn't work: Example. price)) In Spring Data JPA, you can use Query by Example with Repositories, as shown in the following example: Example 3. 6. Understanding this might help to implement optimizations and avoid unnecessary database lookups. This is always preferred if we know our Query result type beforehand. NewPojo(SUM(m. It returns 0 records. public class PersonService {. Here you can see how I've created Visit Entity with all relations which I'm trying to select. If you want to execute a native query, you need to set the nativeQuery parameter of the @Query annotation to true. So i created the interface and changed the return type to the interface, the interface gets returned, but when i call the get methods/return it the values are only null. 2. SaleReport(B. answered Feb 20, 2020 at 15:16. An empty list is returned in Eclipselink as well when no results are Jul 16, 2019 · What I wanna know is repository. Our query method will return an entity object or null. accountType = :accountType", nativeQuery=true) public AccountEntity findByIdAndAccountType(@Param("id") String id, @Param("accountType") String accountType); When i call this method in a helper class, where I will get a list of ids and I loop May 6, 2017 · It will return the first non-null occurrence in its arguments. Note: I am using a simple query as an example for this question. Instant; import javax. Here is my AppUserRepository interface, extending the CrudRepository interface: Feb 17, 2015 · 0. My repository: import org. @MappedSuperclass. or B. @Query("SELECT new com. If you want to retrieve the object from the Optional, you can simply use get () on the Optional. It is null; So when class addBook method to add a book object to collection. Because it deactivates the default one. mavenCentral() dependencies {. public interface RecipeRepository extends JpaRepository<Recipe,Long> {. Oct 29, 2019 · 2. Let's say we have an entry firstname = "First" and lastname IS NULL. Spring Data JPA supports a variable called entityName. size() has the proper number of elements (2), but the elements are null. The issue I'm facing is that the repository. I created Entity Views on top of it to allow easy mapping between JPA models and custom interface defined models, something like Spring Data Projections on Mar 8, 2020 · The call to the categories endpoint is returning list of categories but the call to the billers endpoint using one of the category id is returning a null result . * Nov 15, 2016 · If you use "date" type, I think the code from question should work, but for "datetime" you should use "between" in query or something similar. gradle: repositories {. Thanks for pointing me in the right direction. Column; Dec 6, 2014 · As sumAmount () returns null so I am getting NULLPOINTEREXCEPTION while adding here prinicipal+daoImpl. Please find the code below for your review. . When getting an Optional return type, we’re likely to check if the value is missing, leading to fewer NullPointerExceptions in the applications. and null is null. . code causing the issue and the entire object is coming null. Ex: Step 2 Now to fetch tickets based on optional parameters you can build Specification query using CriteriaBuilder. parent. Unfortunately I can't seem to load any data - I'm sure it's a silly mistake. parameterOne, ?2) = ?2") should work. General query method returning typically the repository type, a Collection or Streamable subtype or a result wrapper such as Page, GeoResults or any other store-specific result wrapper. In your test code you are only setting the addresses on the customer but not the customer on the address. We ran into this a couple months ago and unfortunately, could not find a solution to it. withMatcher("name", contains(). this is the query: Boolean existsPurchesedCoupon(int customerId, int couponId); I called the method: throw new PurchaseCouponException("can buy only once. Configuration: - Spring-boot = 2. Entity. product = :product") int nextSequenceForProduct(@Param("product")Product product); It works well except when there's no values in the table, it throws some type of null value exception from the JPA code. For example if I query (using jsql) "FROM Order o" to return a list of all orders in the table, my list. tableB is null and a. id=?1 AND e. // This is redundant however as JpaRepository has findAll() @Query("SELECT e from ExamEntity e") public List<ExamEntity> getExams(); answered Apr 7, 2021 at 0:51. id=?1") TableA findTableAValues(Long id); But it doesn't give the expected result. I tried findAll as well but didn't work. " and ds. in my case the parent property can be null in case this is a root category but it seems using c. private BillingGatewayService billingGatewayService; public BillersServiceResponse getAllBillersByCatId(@PathVariable Long categoryId) {. @Query("select u. Oct 6, 2019 · The @Query annotation gives you complete control over the executed query. afterwards, the service should return Oct 26, 2018 · I am using spring data JPA, facing issue as result is always coming NULL even if record present into DB. but the system run to null pointer exception apart from return "false". days = days; As I was looking for a solution in sum for my DTO, this solution helped me. After that, we can implement a custom method that would map the results into the data structure we need: @Transactional default Map<Long, User> findAllAsMapUsingStream() {. Thanks in advance! May 31, 2015 · First, if we are writing a query that should return only one result, we can return the following types: Basic type. Apr 6, 2021 · You need to return a list of strings if your selecting the exam names or select the entity. Dec 11, 2015 · and a method in that like below. persistence. Problem: owner of Car (annotated with ManyToOne) is always null. Jan 31, 2015 · Hibernate's equivalent just returns null for no result. @Query native SQL. How i can check when table contain rows and then select sum? What I'm trying to achieve is write the same query using 3 different approaches in Spring Data Jpa using JpaRepository interface: Named Method Strategy. Shivanshu Goyal. Example 1: @Query(value = "SELECT TOP(1) e FROM Employee e WHERE e. Mar 5, 2024 · Conclusion. 510 10 25. The problem occurs when one of the referenced projections return 'null' because that particular column is null in the DB. We’ll also show how to build a dynamic query when the @Query annotation is not enough. Jun 4, 2015 · This basically means that the relationship is managed by the value in the customer field in the Address entity. Aug 23, 2012 · Subject: {kundera-discuss} Query returns no rows. When I try to search using Jpa Repository, it returns nothing but a null Object. That's what I don't want - I want to ignore the filtering based on this parameter as long as it is null. repository. 0, repository CRUD methods that return an individual aggregate instance use Java 8’s Optional to indicate the potential absence of a value. } public interface EmployeeRepository extends CrudRepository<Employee,Long>; { @Query I am developing a web application using Spring Boot and Spring Data Jpa. java. What I want to do is write a custom query method which retrieves a user from the database, given a username. You are indeed correct. Aug 1, 2018 · 2. fraction1)," + "sum (r. into. ) return Optional. I know that most JPA implementations (at least Hibernate and EclipseLink) will return an empty collection - I'm interested in whether this is specified anywhere. Best practices are that exceptions should only be used for exceptional situations, which the absence of a value is not. Dec 14, 2017 · It works fine except null values. Jan 4, 2018 · We know that in sql = NULL is always false. May 16, 2019 · By using the @Query annotation, you get full control over the executed query. One of its powerful features is the @Query Sep 7, 2021 · Is it possible to return optional from repository If @Query in Spring data JPA is used? @Query("SELECT e FROM Employee m WHERE e. String getFirstName(); String getLastName(); } You can then use that interface as the return type of a repository method. As the name indicates, it denotes entity name referenced by the repository you are in. findByMediaType, where mediaType is one of the entity properties, returns empty list. Nov 30, 2017 · 1. Oct 17, 2017 · 6. Jun 5, 2019 · I've been trying to use Spring Data JPA Projections. If we inspect the implementation of the delete method carefully, there is an if statement that when the entity to be deleted doesn't exist returns nothing. It let's the JPA know that the value is generated during Insertion time so it will query the value again from the DB to get the updated value after saving it. UPDATE. When I ran the same code on junit test environment, but it completely worked. Nov 4, 2021 · Apparently this is possible with something called Interface projection. In the constructor_expression and collection_valued_input_parameter, the list of values must not be empty; it must contain at least one value. This is a perfect use case for Blaze-Persistence Entity Views. You should have something like this: @Autowired public GeoMasterDao gmDao; in the class which is executing the query. fraction2)) from Report r") Report calculateTotalReports(); When the database is full, it works fine, but when it is empty, the application crashes. Oct 6, 2015 · 8. Also using @Value annotation to concat some properties of some referenced projections. I need to pass this parameter in JPA Query. I also tried to hard code a value of todoID and I still get a null result. If the data is hard coded, like memberRepository. This process is tightly connected to the transactions and their propagation. )). I have Java springBoot project With repository that included boolean custom query. The mentioned method CrudRepository. You can choose between a native SQL or a JPQL query. findById was inherited from ancestor class CrudRepository. JpaRepository; public interface HouseRepository extends JpaRepository<House, Long> {. pname = :pname") List<Users> findByusernamewithRole(@Param("uname") String uname , @Param("pname") String pname ); Jun 21, 2018 · 0. @OneToMany(mappedBy = "library", cascade = CascadeType. I am hoping that someone with a sharper eye than I can discern what I am doing wrong. 0). But when I get a Documentation from VersionableFileRepository its getSystem function returns null. Sep 23, 2015 · Step 1: Implement JpaSpecificationExecutor in your JPA Repository. I found the solution that works for me, and this is the code: @Query("select i from Invoice i where " +. – Aug 12, 2021 · As of Spring Data JPA release 1. I call this findByLastnameAndFirstname(null, "First"). It returns a Optional<T> since spring-data migrated to Java 8 (since Spring-Data-Jpa version 2. Query subject keywords. I'm learning Spring Data and JPA, and I have trouble making a simple ManyToOne - OneToMany connection within my entities. Blaze-Persitence is a query builder on top of JPA which supports many of the advanced DBMS features on top of the JPA model. statusCode in :paymentStatuses)" This solution will work for the empty list, null list, and a list with items 1 or more. private String answer; private Long cnt; public SurveyAnswerStatistics(String answer, Long cnt) {. If you want to run a native query instead, you set the nativeQuery parameter to true. Assume that you have a search filter model named PersonSearchFilter by which you want to search Person model; @Query(value = "SELECT Null Handling of Repository Methods. totalDays)) FROM MyEntity m") NewPojo selectTotals(); Float days; public NewPojo(Float days) {. Create multiple methods in your repository like. Table 1. You have to use IS NULL. Jul 20, 2016 · From my little and personal experience, if you search for an object on your repo, for example, by Id or Name the named query method returns an object of type T, but if no results are found from your repo, it will return null. I couldn't find the reason why jpa query is returning null. Any idea on why derived method does not fetch records?. Example: model relationship between cars and people (owners), one person can own multiple cars, but one car is owned by only one person. I have been writing a custom JPA Query to handle a complicated query that may or may not return a result. By default, Spring Data JPA expects that you provide a JPQL query. user, ExampleMatcher. To assign a native query to that method, you need to annotate it with @Query, provide the native SQL statement, and set the native attribute to true. 7. Sep 30, 2021 · My JPA derived method findByBatchIdAndInstitute(Long id, Institute inst) does not fetch correct records. findById (id) method returns null, whereas data is available in the DB. I'm working on spring boot with jpa, I try to use onetomany and for some reason when I try to post the request on postman it creates my parent object but does not use the child foreign key, and for that I'm getting null. 1 more thing: once I played with my code and somehow I got it to work but it's succeeded only one time and now it's not Mar 1, 2021 · I am making a Spring Boot backend, and I have the following problem. Ok I'm new to Java Spring and I am simply trying to access some data from a MYSQL database. I made sure the variable names "batchId" and "institute" are spelled correctly in the derived method. It's not optimal, but like you, we fought trying to get a pure spring-data-jpa solution. Its usage is select x from #{#entityName} x. 'MATURITY' is null. I would suggest you also avoid to use outdated Date and use instead java 8 Date/Time API. Right now I am running a query that would return no results, and therefore the List<Persons> that I assign the results to should be an empty List. Dec 31, 2023 · Luckily, Spring JPA supports such return types, and we can benefit from autogeneration: @Query("select u from User u") Stream<User> findAllAsStream(); Copy. Try changing. I believe that is how it works in JPA and probably in the Spec. It cause NullPointerException. Apr 6, 2020 · 15. I want to write a query that selects all rows by given type collection for my fileRepository (There are 3 types as "1", "2" and "3"), if that parameter is not given from frontend, then it should return all rows. false = IS NULL. Call these two methods based on location is null or not null @Query(value = "SELECT t. I suppose it would return me empty result because = NULL is always false. I have used a delete method of Spring Data JPA in the service layer, but I wonder why neither the deleteById method nor delete method has any return values. IDENTITY) @Column(name = "id") private Long id; Nov 17, 2016 · I realize that I could loop through the returned pages and look for nulls to remove, but I'd rather have the query just return values that are not null. getById can retrieve a database record by id. What we did, and you probably could too, was to create a service, inject the entity manager, and call it from there. JPA repository method findByField returns all data. " and (COALESCE(:paymentStatuses, null) is null or ds. This sql works: sampleName is not null and sampleName != '' But when I try to do it with criteria builder like this: // this is in a private method filterBySampleNotEmpty . What is even more baffling is that this code is within a reusable function, and it is working fine everywhere else it is called. You can choose between a JPQL or a native SQL query. For example, it doesn't return the users whose phone number is NULL. ) Integer getSum(); default Integer safeGetSum(. active = ?1") Optional<Test> findByIds(Boolean isActive); How can I achieve this, rather than creating 2 separate queries for IS NULL & IS NOT NULL. of(. 0. 2. You can do like this by mapping a new POJO. Mar 3, 2022 · @Column(name = "NEW_COLUMN", nullable = false) private String newColumn; @Query(value = "select * from mytable ", nativeQuery = true) The query returns all the rows in the table, but the field newColumn is always null, the other fields are populated correctly. Step 1: Declare a simple bean class. – Jan 3, 2019 · Spring enables us to use object models as query parameter with @Param annotation. id in :id AND a. jpa. For this example, this can be accomplished as in the code snippet below. 4, we support the usage of restricted SpEL template expressions in manually defined queries that are defined with @Query. @Query with JPQL. count = cnt; Step 2: Return bean instances from the repository method. Activity_Type = 'MATURITY'. Ex: return (root, query, criteriaBuilder) -> {. Guava / Java 8 Optional<T>. Mar 26, 2015 · Surely one could simply return the row count and check if it is larger than zero, but it is a little more “clean” to return a boolean value. I tried debugging spring code and checked whether statement created correctly or not. Can be used as findBy, findMyDomainTypeBy or in combination with additional keywords. I have written JPA code in Spring boot where I want to perform CRUD and other operations on an Entity, I have written RecipeRepository that extends JpaRepository. (I've followed a number of sources, including this one) I am using: java spring-boot, mysql, jpa, gradle. Geospatial types (such as GeoResult, GeoResults 3,073 2 24 17. priviJoin p where u. It provides a clear and explicit way to convey the message that there may not be a value, without using null. Some documentation Feb 2, 2020 · You have to remove the findAll() method from RoleMapSkillRepository. 1. Exists projection, returning Oct 6, 2018 · Note: This is the same question like Does Hibernate return null or empty collection if table in relation is empty?, only for the JPA spec instead of for Hibernate specifically. I am using a Repository with @RepositoryRestResource annotation to achieve this. time. I made sure the query param is not null and there are records in the table for the param passed. Here are all my class entities, SQL tables, and JpaRepository interface : SQL foreign key : CONSTRAINT `fk_year` FOREIGN KEY (`year_id`) REFERENCES `YearDate` (`id`) YearDate class : @Id. It seems that books type of Collection in Library class is not initilized. When I do the same query on the command line, the values for the column are there. But, JPA provides a special Query sub-type known as a TypedQuery. Using Spring Boot 2. Here is my build. I have a class with an embedded Id. @Entity @Table(name="employees") Class Employee{ . List<Predicate> predicates = new ArrayList<>(); Returns the query string to execute an exists query for the given id attributes. 5. The query outputed by JPA in the console works fine when I test it agaisnt the database. springframework. As pointed out by some users, it seems that a newest version of Hibernate returns an empty list instead. Collection<Coupon> findByCustomerAndUsedOnIsNull(Customer customer); List<Coupon> findByUsedOnIsNull(); Also you can check how this queries will be Refer this Spring Data JPA Query creation this will help you lot to understand and create May 4, 2017 · For dynamic situations there are several other options such as @Query and QueryDSL. Mar 31, 2016 · Solution for JPQL queries. You should check to make sure that your DAO object is being autowired correctly. Additionally, it makes our code much more With the JavaConfig documentation I have set up a Spring JPA configuration, but when calling the save method in my repository a null pointer is thrown. JPA can’t deduce what the Query result type will be, and, as a result, we have to cast. Feb 21, 2018 · Here are some possible options for you. So, taken into account all above, you should use 1) You need to create a constructor for the SaleReport class that accepts all the parameters that you use in the select statement and in the exact order. this. parameterOne = :parameterOne OR ((:parameterOne IS NULL) OR (:parameterOne = ''))"); Notice that if the parameterOne is null or empty, then the clause is always true and so doesn't influence the whole WHERE clause. data. Mar 26, 2018 · 1. An other workaround to check that a list type parameter is empty in dynamic queries is putting a getter method on our search model. ignoreCase()) . Can someone help me with the following queries May 26, 2020 · I'm using Lombok also for getters and setters. May 30, 2018 · Spring JPA repository query is returning null but if I run the same query on database it returns the results. However I notice that if the example object has all the values set a null, the example query returns all the values of the table. RELEASE, spring-boot-starter-data-jpa and mysql 5. getSingleResult() forces you to use exception handling in absence of a value, even though the absence of a value is a common and natural situation. Feb 26, 2019 · I use database query with JPA like that: @Query("SELECT " + "new Report(" + "sum (r. May 4, 2021 · Boolean isActive = true/false. @Query ( "SELECT CASE WHEN COUNT(c May 23, 2019 · You may have two different query to handle Null and Not Null. Sep 26, 2018 · Yes, I've tried quite a few things, including putting the query in a repository (so there is no findFirst or anything like that). Repository Class: Jul 12, 2009 · If the query result is empty, a null is returned. Jan 8, 2024 · We need to pay attention to the return statement in our previous example. ALL) private Collection<Book> books; public void addBook(Book b) {. \-[METHOD_CALL] MethodNode: '('. username = :uname AND p. My workaround solution based on Optional is: Jul 15, 2022 · As of Spring Data JPA release 1. Besides that, Spring Data supports returning the following wrapper types on query methods: Alternatively, query methods can choose not to use a Supported Query Return Types. com Jan 8, 2024 · In this tutorial, we’ll demonstrate how to use the @Query annotation in Spring Data JPA to execute both JPQL and native SQL queries. I ended up using @Generated(value = INSERT) annotation for the accountNumber field. However if I use @Query with native query it works fine. @Query(value = "select a from TableA a where a. Jan 8, 2024 · The Optional type was introduced in Java 8. The findOne () does not seem to be working. Nov 17, 2023 · As of Spring Data JPA release 1. statusCode in :paymentStatuses". public List<Recipe> findByName(String name); public Recipe findOneByName(String name); Mar 15, 2016 · 1. 2) Alter your query so that you wrap the selected columns with a new statement: @Query(value = "SELECT new org. Sep 8, 2016 · Your query returns only one field, Returned object from Spring Data Jpa query has null values. If SUM(points) returns null, it will try the next argument, which is 0. I'm not sure what the best way to query for not null on the entity status id. @Query(value = "SELECT * FROM account a where a. Mar 23, 2023 · SpEL (Spring Expression Language) is a language that supports querying and the manipulation of an object graph at runtime: #{expression} The most useful SpEL expression that can be used in the @Query annotation is #{#entityname}. pname from Users u join u. Aug 28, 2023 · Spring Data JPA (Java Persistence API) simplifies the development of data access layers in Java applications by providing ready-to-use repositories. +-[METHOD_NAME] IdentNode: 'ISNULL' {originalText=ISNULL} So can anybody please tell me how to use Feb 15, 2020 · The problem comes with the named queries when the null is passed as the parameter is optional, the JpaReposotory uses the null as a criterion for the searching in the database. It works fine for single type query (not Collection) Jun 26, 2010 · I don't get an error, the query simply returns null objects. SQL and JPA support the COALESCE function, which can be used to work around a parameter that can sometimes have a NULL value. This is the controller : @Autowired. If SUM(points) returns an value, it will return the actual value without testing the next arguments. } My POJO's: AbstractHouse. "i. However from my testing, it returned the entry. @Query("select t from Test t WHERE t. Methods that can return more than one element, will produce an empty collection List<T>(not null). I'm trying to check if a column in the db is not an empty string or not null but I can't figure out how to do it with criteria builder queries in order to get actual objects back. When the return value is not a list, or some wrapper (plus some others check below), & there are no matching records, the return will be Aug 8, 2018 · I wrote below query in TableA Jpa Repository. In JPA would return empty List or Null. This is my entity class: import java. Therefore I wanted to ask if there is a Sep 19, 2017 · 2. 0. Query by Example using a Repository. ) And (. If you want to check the parameter has a null or empty value, you should do like this: @Query("SELECT t FROM Test t WHERE (t. @Query("SELECT e FROM MyObject e WHERE COALESCE(e. This is supported for JPQL queries within the JPA specification. public interface PersonRepository extends JpaRepository<Person, String> { . withMatcher("phoneNumber", contains()) Jul 4, 2017 · 2. ExamName from ExamEntity e") public List<String> getExams(); or. Upon the query being run, these expressions are evaluated against a predefined set of variables. When I get a Software from VersionableFileRepository and call the getSystem function on that I get the actual System within the relationship. Jun 3, 2020 · I am able to get the CRUD Repository data calls to work without any issues, however I extended that to the JPA Repository and added the QueryByExampleExecutor interface. When using query by example does the entire object need 4. @Repository public interface CompanyRepository extends JpaRepository<Company, Integer> {. I cannot add mandatory field, since the queries must be complete dynamic, also pagination is not an option. It is still null, so probably there are 2 records in the database but there is no relation. First of all though, a repository should return the optional to a service, which then handles the case in which the optional is empty. true = IS NOT NULL. Hence nothing will be returned from Mar 31, 2022 · 1. "); and this is the error: Mar 16, 2018 · Indeed, in the latest version of Spring Data, findOne returns an optional. However, an exception is still in the cards for the case with more than one actual result. orElse(0); More info on null handling in repositories. @GeneratedValue(strategy = GenerationType. May 30, 2018 · 1. Activity_Date_Time Between null AND null. I'm trying to select a sequence id from the database using this query: @Query("select max(pi. ); Your named parameters are being replaced by null and if you check null with null, it will be a binary operation. The following table lists the return types generally supported by Spring Data repositories. By default, Spring Data JPA, expects a JPQL query with the @Query annotation. It Looks like the problem is in the Embedded Id, sice I made a test with a class without this and it worked fine. Statement is created correctly and parameter is also populated correctly. In this case you can write queries like. This method is pre-defined, same as the findAll methods. public interface PlayerName {. Aug 8, 2021 · The JpaRepository. expirationDate < :tomorowMidnight " +. NAME = :name", nativeQuery = true) Employee getEmployeeByName(@Param("name") String employeeName); Example 2: Jul 12, 2019 · Or you can wrap this getSum() with a default method; @Query(. The default behavior for a mock is to return null. Functions save() and findAll() are working fine. When you extends the CrudRepository you have to add Entity object and Entity object's Id data type. Parameters: entityName - the name of the entity to create the query for, must not be null. findById("M001");, it working fine. card=?2") Employee getById(Integer id, Card c Mar 20, 2021 · The list of values can come from a number of different sources. withIncludeNullValues() . However, consult the store-specific documentation for the exact list of supported return types, because some types listed here might not be supported in a particular store. username,p. See full list on baeldung. As of Spring Data JPA release 1. parameterOne, ?1) = ?1 AND COALESCE(e. Hibernate JPA implementation (Entity Manager) return null when you call query. The null pointer exception is probably happening because gmDao is null, rather than some problem with the query. Hence try to pass timestamp from code to @Query to get rid of this. matching() . Feb 19, 2019 · Using spring-data-jpa. getResultList () with no result. order_date AS date," + "E. Jun 27, 2018 · The mocking takes Spring Data JPA out of the picture completely as it now is just a proxy implemented by a mock from Mockito. If I replaced the is null with the is empty key word, query gives the expected result. expirationDate >= :todayMidnight and i. sumAmount (); So I am thinking to return 0 if the amount is null so tried ISNULL and IFNULL both like this. RELEASE Jun 11, 2021 · This seems to be working fine except in one case where the property for the nested object is null. Sep 16, 2022 · 0. ofNullable(getSum(. Apr 4, 2015 · For example for any columnA you can write query like query like. yp fv vp yk hk mg bq ma bv jm
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