Need help with Spring JPA. Say I want to find who checkout the car when gotten a traffic ticket. So that licenseNum and
citationDate is greater than checkoutDate and citationDate is less than returnDate; or
citationDate is greater than checkoutDate and returnDate is null.
Currently,
List<SomeEntity> findByLicenseNumAndCheckOutDatetimeBeforeAndReturnDatetimeAfterOrReturnDatetimeIsNullOrderByIdDesc()
produces #1 correctly but produces all licenseNum with returnDate null.
How do I write spring JPA statement with 'or' statement correctly?
You can actually think of using a Query annotation where you can specify a custom query. Yon can choose a more meaningful method name and easy to maintain/change.
Related
Does the list returned by a CRUD repository method such as the following have a predictable order?
List<UserProfile> findAllByGroupKey (String groupKey);
The database is MySQL 5 and Spring Boot version is 2.2.7. I'd like the order of the items in the list to be the same as they were stored in the database, but I'm not sure if it's enough to omit `orderBy' to achieve this result. I couldn't find any documentation on this.
I did some testing with the specified configuration (MySQL 5 and Spring Boot 2.2.7). The answer is definitely "no", at least if the index is not a progressive number (in my case it is an UUID).
The order is in no way predictable based on how the data was entered.
The only way to get the rows in the same order as they were entered into the database is to add an additional sort variable (such as a sequence number or a timestamp) and explicitly sort the rows with "orderBy" based on that variable.
I am trying to write a query in Spring Boot, I have the query written like this
, but when I search for the vehicle objects by year by doing http://localhost:8080/vehicles?year=(year) it returns to me all of the vehicle objects instead of only ones that match the year.
Try this
http://localhost:8080/vehicles?year=2001
If still error try your query in sql command, i think any mistake in your query or check again in your controller file
I have a data JPA entity where it contains a "price" type Double. Now, the users need to able to filter the records based on that field (Between min and max). Now the problem is, the value in the DB can be null for some records. My data JPA repository uses a native query like "price BETWEEN :priceFrom AND :priceTo". Now, if the user does not specify anything in the filter conditions, all record including the ones where prices is null should be returned. However, this query does not return those record. I know, I can create a new method with query "price IS NULL" and check the filter values in my service layer and call the null version if nothing is specified. But, I have multiple fields with the same requirement then it results in a lot of duplicate methods to maintain. Is there a better approach to handle that situation?
It seems to me, that you can specify
(:priceFrom is null and :priceTo is null and price is null)
OR price between :priceFrom and :priceTo
if priceFrom and priceTo are entered, second part of OR will be used, otherwise it selects records where price is null
Since you are using Spring Data JPA - Specifications should solve this for you. This is a JPA Criteria based solution.
For any complex-enough API – searching/filtering your resources by very simple fields is simply not enough. A query language is more flexible and allows you to filter down to exactly the resources you need. Hence you should easily be able to program for NULL (in the scenario that you currently need) and anything else that you might need.
This is scalable for multiple fields and easy to code/configure. There are a few links which will give you more insight into it
Spring Blog
Tutorial 1
Tutorial 2
Hopefully, this is helpful.
I am working with a legacy system which requires doing a query for a partial match on a number field. So I want to do something like
where ID like concat(:num, '%') where num parameter is of the type Long. Is there a way to do that using Spring Data JPA derived queries. If the id was a string then I can simply do
findByIdContaining(String id)
I would appreciate any help.
No, this is not possible with derived queries (those where the query is derived from the method name). But it's easy with an annotated #Query annotation.
I'd like to query a database using a Spring Data JPA query method and retrieve the records which do not have a certain enum value. What's working is
findBySuggestionNot(Suggestion suggestion, Pageable pageable);
and then I hand in e.g. Suggestion.rejected.
What I want is
findBySuggestionNotRejected(Pageable pageable);
But this results in an error because "NotRejected" is not a property of Suggestion. Any pointers?
Using full-qualified name instand of XENUM.XXX, eg:
where a.status= com.foo.bar.Status.ACTIVED
And Be Careful, your enum should be uppercase ranther then lowercase ,camel case, otherwise the exception like "invalid path com.foo.bar.Status.ACTIVED ..." would be throw by spring. I am using Spring Boot 2.1.1.RELEASE