Spring Boot JPA unknown column in field list
"That means I should change my column name in MySQL table to account_id"
Yep, this is a good idea because of naming convention, but also you can configure proper naming strategy:
spring.jpa.hibernate.naming_strategy=org.hibernate.cfg.EJB3NamingStrategy
Or you can try to print your column name in lower case. (If your MySQL is Windows based)
@Column(name="accountid", nullable = false, unique = true)
What am I mapping incorrectly? Unknown column in the 'field list'
I was able to resolve the issue by changing the naming strategy in my application.properties file as mentioned in SQL Error: 1054, SQLState: 42S22 Unknown column in 'field list' error Java Spring Boot Mysql error
Thank you all for your help and the vital information regardless.
Cheers :)
Unknown column in 'field list' in cascading persistance
You need to add the @JoinColumn
annotation to give the column name value specifically in your TimesheetDay
entity.
@ManyToOne
@JoinColumn(name="timesheetid")
private Timesheet timesheet;
JPA Unknown Column in Field List
Try to define your join-table mapping manually in JPA. Drop your schema and let JPA create your tables:
Accommodation class
@OneToMany(mappedBy = "accommodation", fetch = FetchType.EAGER, cascade = CascadeType.REMOVE)
@JsonManagedReference
private List < Booking > bookings;
Booking class
@ManyToOne(fetch = FetchType.EAGER)
@JoinTable(name = "accommodation_booking_join_table",
joinColumns = {@JoinColumn(name="booking_id")},
inverseJoinColumns = @JoinColumn(name = "accommodation_id"))
@JsonBackReference
private Accommodation accommodation;
Unknown column in field list after trying to create OneToMany relationship
First mistake: you can't use @Column
on an association, you must use @JoinColumn
.
Second mistake: @OneToMany(mappedBy = "something")
means that the @JoinColumn
is on the other entity (owning side).
Third mistake: @ElementCollection
means that you want a collection of non-entities (Strings, Embeddables or Basic types), but here Vote
is an entity.
The mapping in Article
should be:
@OneToMany(mappedBy = "article", cascade = CascadeType.ALL)
private List<Vote> voters = new ArrayList<>();
Fourth mistake: in your UPDATE
native query, you can't set Article.voters
as it's not a column but a JPA one-to-many collection mapped to the many-to-one Vote.article
. That is basic JPA, you'd better read the docs about @ManyToOne
management before proceeding.
eg. https://www.baeldung.com/jpa-joincolumn-vs-mappedby
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