I'm using spring boot and want to add a list of products to a page as a foreign key but how can I maintain the ArrayList order when I retrieve from the database? Should I have an intermediate table eg PageProductOrder
which maintains product primary key and order column?
@Entity
public class Page {
@OneToMany
@JoinColumn(name = "product_id")
private List<Product> products;
You could do this by using @OrderColumn
- this will use a column in the entity for ordering :
@OneToMany
@JoinColumn(name = "product_id")
@OrderColumn(name = "product_index")
private List<Product> products;
The column product_index
in Product
entity will be used for maintaining order.
You can define the order by using the @OrderBy
annotation.
@OneToMany
@JoinColumn(name = "product_id")
@OrderBy(value = "name ASC")
private List<Product> products;
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