I am working with v2.2.3 of Neo4J and Spring Neo4j Data SDN 4
I want to return a few properties of a node using a cypher query and map them into attributes of a POJO.My function in Spring data repository looks something like this
#Query(
"MATCH(n:ServiceProvider{profileStatus:{pStatus},currentResidenceState:{location}}) RETURN n.name,n.currentResidenceAddress ,n.employmentStatus,"
+ "n.idProofType,n.idProofNumber
ORDER BY n.registrationDate DESC SKIP{skip} LIMIT {limit}")
List<AdminSearchMapResult> getServiceProviderRecords(
#Param("pStatus")String pStatus,
#Param("location")String location,
#Param("skip") int skip,#Param("limit")int limit);
I get an error like
Scalar response queries must only return one column. Make sure your cypher query only returns one item.
I think its because of the fact that I cant bundle all the returned attributes into a view that can map into the POJO
If I return the node itself and map it into a POJO it works
Kindly guide
This can be done using #QueryResult
Annotate the AdminSearchMapResult POJO with #QueryResult. For example:
#QueryResult
public class AdminSearchMapResult {
String name;
String currentResidenceAddress;
...
}
Optionally annotate properties with #Property(name = "n.idProofType") if the alias is different from the field name.
Related
Let's assume we have a model like this:
class User {
String name;
Integer age;
}
The query returns results, and the extraField is mapped, but the user isn't.
I have a query that joins the User table with another table and returns the User object and one more field that comes from this other table.
Is it possible to define an open projection in Spring that would map the return values from the query? I guess it should look something like the following, but I can't get it to work.
interface UserProjection {
User getUser();
#Value("#{target.extrafield}")
String getExtraField();
}
"In clause" not working on passing multiple values
Repository code
#Query( "select myObject from MyObject myObject where myObject.anyColumn in :values" )
public List<MyObject> findPriDestByCntryAbbr(#Param("values") List<String> values);
Calling from service
List<String> values = Arrays.asList(valuesString.split(","));
List<MyObject> result = myObjectRepository.findByAnyColumns(values);
When i am passing single value it is retrieving correct information from table, But on passing multiple values in List "values" giving empty result
Ideally it should work. You should check the values variable.
The other way you can try is- without writing query.
As per the doc we can create MyObjectRepository interface by extending Repository interface and then have a method to fetch all MyObjects. It goes like:
public interface MyObjectRepository extends Repository<MyObject,**Long**> {
List<MyObject> findBy**AnyColumn**In(Collection<String> values);
}
"AnyColumn" is your column name and second parameter for Repository interface is as per your requirement.
How to retrieve data from elasticsearch containing special characters like . / - ... using spring data ?
I have document defined like this:
#Document(indexName = "audit-2018.135", type = "audit")
public class Trace {
#Id
private String id;
#Field(type = FieldType.Text)
private String uri;
// setters & getters
}
I need to retrieve data from elasticSearch by field uri.
Here's an example how data looks:
martin-int-vip.vs.cz:5080/kib/api/runtime/case/CASE0000000000324223
When using kibana I can use:
uri: "martin-int-vip.vs.cz:5080/kib"
and I get back the record above which contains desired substring.
Now I need to achieve the same from java however in spring data it's not working as expected.
I have elasticSearchRepository defined like this:
public interface TraceRepository extends ElasticsearchRepository<Trace, String> {
List<Trace> findByUriContaining(String uri);
}
when I call method findByUriContaining with parameter uri as:
martin-int-vip.vs.cz:5080\/kib
or even this
martin-int
I get back 0 results. When I send "kib" as parameter it returns correctly all records containing word "kib" however it's not working with special characters like . / - etc. How should I query my elasticSearch from java to get all records which contains my desired substring ? Thanks
I found out that by default elasticSearch analyzer tokenize your query. Instead of "martin-int-vip.vs.cz:5080/kib" it looks for a field which contains martin and int and vip...
In order to query these kind of fields you need to change behaviour of analyzer or you can use elasticSearchTemplate and Criteria to build more flexible queries.
I have a users table and I am trying to use annotated Queries in spring boot to get a result set. I am able to get result set as a list, but that does not have field names. How do I get the result set with field name as key and value pairs?
Current response [[1,"Jay"]] , what I want to do is {"id":1,"Name":"Jay"}
-----Here is my repository class-----
#Repository
public interface UsersauthRepository2 extends JpaRepository<Users2,Long> {
#Query("select id,name,email from Users u where LOWER(email) = LOWER(:email) and LOWER(u.password) = LOWER(:password)")
List<Users2> querybyemail(#Param("email") String email,#Param("password") String password);
}
The request doesn't return fields names.
If you need to get them :
You have them already as method argument
You need to use reflection.
Good luck
I want to define two #NamedNativequery on entity class . When tying to define eclipse gives a error.
Duplicate annotation of non-repeatable type #NamedNativeQuery. Only
annotation types marked #Repeatable can be used multiple times at one
target.
From that error , I know we cannot define two define two #NamedNativeQuery of the entity class like
#Entity
#Table(name = "abc")
#NamedNativeQuery(name = "ABC.getSomeMethod1" query = "some_query",resultSetMapping ="abcDTO")//1st name query
// #NamedNativeQuery(name = "some_name" query = "some_query",resultSetMapping ="some_dto")//try to define second query , but gives error
public class ABC {
}
I am using spring repository at dao layer to called the method which bind with this query
public interface SomeInterface extends JpaRepository<ABC, Long> {
#Query(nativeQuery =true)
List<ABCDTO> getSomeMethod1(#Param("someParam1") long someParam1, #Param("someParam2") String someParam2);
}
The senario is that I want to run the 1st native sql (which run fine) query and then run the 2nd native sql query(want to run this also from same). How to solve this or What is the possible solution.
If this way I cannot run the two native sql query then is there any other to achive this.
You can define multiple named queries like this
#NamedNativeQueries({
#NamedNativeQuery(name = "ABC.getSomeMethod1"
query = "some_query",resultSetMapping ="abcDTO"
),
#NamedNativeQuery(name = "some_name"
query = "some_query",resultSetMapping ="some_dto"
)
})
Then in the business layer under the transaction you can call these two queries one after another,
If its a simple join between two entities and select and display better go with join's. Always remember to have those columns index in the Table ;)