Récupérer des objets de la sous-relation Cassandra avec Kundera (Pelops - JPA)

Question

Nous obtenons un objet nul en récupérant des données de Cassandra en utilisant l'annotation JPA OneToOne/OneToMany (voir l'exemple ci-dessous, où "item" est nul).

[ 
{ 
    "idProduct":"095102f1-a987-4f7c-88c3-153d80b6977f", 
    "item":{ 
    "idItem":"b75acb06-eab6-48c1-99e9-fc7d48cf930b", 
    "shortDescription":"Item 71", 
    "longDescription":"An another item 71", 
    "name":"Item Named 71", 
    "image":"Image 71" 
    }, 
    "options":[ 
    { 
     "idProductOption":"0fa701dc-5394-47ea-86f6-e3dbf6c263da", 
     "idProduct":"095102f1-a987-4f7c-88c3-153d80b6977f", 
     "productOptionValue":[ 
      { 
       "idProductOptionValue":"1b594b56-7767-4909-9d16-add51903c0f2", 
       "idProductOption":"0fa701dc-5394-47ea-86f6-e3dbf6c263da", 
       "item":null 
      } 
     ] 
    } 
    ] 
} 
] 

Si nous accédons directement à "ProductOptionValue", il se charge parfaitement. Voir le chargement correctement (donc, nous pensons que c'est une limitation de niveau à charger).

[ 
{ 
    "idProductOptionValue":"1b594b56-7767-4909-9d16-add51903c0f2", 
    "idProductOption":"0fa701dc-5394-47ea-86f6-e3dbf6c263da", 
    "item":{ 
    "idItem":"17803826-0be6-4b94-813d-76abf969fa97", 
    "shortDescription":"Item 41", 
    "longDescription":"An item 41", 
    "name":"Item Named 41", 
    "image":"Image 41" 
    } 
} 
] 

Nous utilisons les annotations suivantes pour relier les objets.

@Entity 
@Table(name = "Product", schema = "kunderaexamples@cassandra_pu") 
public class Product { 
    @Id 
    @Column(name = "idProduct") 
    private String idProduct; 

    @OneToMany(cascade = { CascadeType.ALL }, fetch = FetchType.EAGER) 
    private List<ProductOption> productOption; 

    @OneToOne(cascade = { CascadeType.ALL }, fetch = FetchType.EAGER) 
    @JoinColumn(name = "idItem", table = "Item") 
    private Item item; 

    public String getIdProduct() { 
     return idProduct; 
    } 

    public void setIdProduct(String idProduct) { 
     this.idProduct = idProduct; 
    } 

    public List<ProductOption> getOptions() { 
     return productOption; 
    } 

    public void setOptions(List<ProductOption> options) { 
     this.productOption = options; 
    } 

    public Item getItem() { 
     return item; 
    } 

    public void setItem(Item item) { 
     this.item = item; 
    } 

    public Product() { 
    } 
} 

@Entity 
@Table(name = "ProductOption", schema = "kunderaexamples@cassandra_pu") 
public class ProductOption { 
    @Id 
    @Column(name = "idProductOption") 
    private String idProductOption; 

    @Column(name = "idProduct") 
    private String idProduct; 

    @OneToMany(cascade = { CascadeType.ALL }, fetch = FetchType.EAGER) 
    private List<ProductOptionValue> productOptionValue; 

    public String getIdProductOption() { 
     return idProductOption; 
    } 

    public void setIdProductOption(String idProductOption) { 
     this.idProductOption = idProductOption; 
    } 

    public List<ProductOptionValue> getProductOptionValue() { 
     return productOptionValue; 
    } 

    public void setProductOptionValue(List<ProductOptionValue> productOptionValues) { 
     this.productOptionValue = productOptionValues; 
    } 

    public String getIdProduct() { 
     return idProduct; 
    } 

    public void setIdProduct(String idProduct) { 
     this.idProduct = idProduct; 
    } 

    public ProductOption() { 
    } 
} 

@Entity 
@Table(name = "ProductOptionValue", schema = "kunderaexamples@cassandra_pu") 
public class ProductOptionValue { 
    @Id 
    @Column(name = "idProductOptionValue") 
    private String idProductOptionValue; 

    @Column(name = "idProductOption") 
    private String idProductOption; 

    @OneToOne(cascade = { CascadeType.ALL }, fetch = FetchType.EAGER) 
    @JoinColumn(name = "idItem", table = "Item") 
    private Item item; 

    public String getIdProductOptionValue() { 
     return idProductOptionValue; 
    } 

    public void setIdProductOptionValue(String idProductOptionValue) { 
     this.idProductOptionValue = idProductOptionValue; 
    } 

    public Item getItem() { 
     return item; 
    } 

    public void setItem(Item item) { 
     this.item = item; 
    } 

    public String getIdProductOption() { 
     return idProductOption; 
    } 

    public void setIdProductOption(String idProductOption) { 
     this.idProductOption = idProductOption; 
    } 

    public ProductOptionValue() { 
    } 
} 

@Entity 
@Table(name = "Item", schema = "kunderaexamples@cassandra_pu") 
public class Item { 
    @Id 
    @Column(name = "idItem") 
    private String idItem; 

    @Column(name = "short_description") 
    private String shortDescription; 

    @Column(name = "long_description") 
    private String longDescription; 

    @Column(name = "name") 
    private String name; 

    @Column(name = "image") 
    private String image; 

// @Column(name = "context") 
// private Context context; 
// 
// @Column(name = "inventory") 
// private Inventory inventory; 
// 
// @Column(name = "price") 
// private ItemPrice price; 

    /* 
    * GETTERS AND SETTERS 
    * */ 
    public String getIdItem() { 
     return idItem; 
    } 

    public void setIdItem(String idItem) { 
     this.idItem = idItem; 
    } 

    public String getShortDescription() { 
     return shortDescription; 
    } 

    public void setShortDescription(String shortDescription) { 
     this.shortDescription = shortDescription; 
    } 

    public String getLongDescription() { 
     return longDescription; 
    } 

    public void setLongDescription(String longDescription) { 
     this.longDescription = longDescription; 
    } 

    public String getName() { 
     return name; 
    } 

    public void setName(String name) { 
     this.name = name; 
    } 

    public String getImage() { 
     return image; 
    } 

    public void setImage(String image) { 
     this.image = image; 
    } 

// public Context getContext() { 
//  return context; 
// } 
// 
// public void setContext(Context context) { 
//  this.context = context; 
// } 
// 
// public Inventory getInventory() { 
//  return inventory; 
// } 
// 
// public void setInventory(Inventory inventory) { 
//  this.inventory = inventory; 
// } 
// 
// public ItemPrice getPrice() { 
//  return price; 
// } 
// 
// public void setPrice(ItemPrice price) { 
//  this.price = price; 
// } 

    public Item() { 
    } 
} 

Answer 1

On dirait qu'il y a un problème lié au nom des attributs.

Vérifiez ce lien https://github.com/impetus-opensource/Kundera/issues/158