Updating entity in database (ExtJS -> GSON -> Hibernate -> DB)

[kornicameister]

Hi I have model defined like this

Ext.define('WMS.model.entity.Unit', {
    extend: 'Ext.data.Model',


    requires: [
        'WMS.model.entity.Product'
    ],


    fields: [
        {
            name   : 'id',
            type   : 'int',
            persist: true
        },
        'name',
        'description',
        {
            name   : 'warehouse_id',
            type   : 'int',
            mapping: 'warehouse.id'
        },
        {
            name   : 'unittype_id',
            type   : 'int',
            mapping: 'type.id'
        },
        { name: 'size', type: 'int', defaultValue: 0},
        { name: 'maximumSize', type: 'int', defaultValue: 0}
    ],


    associations: [
        {
            type          : 'belongsTo',
            associationKey: 'warehouse',
            model         : 'WMS.model.entity.Warehouse',
            getterName    : 'getWarehouse',
            setterName    : 'setWarehouse',
            foreignKey    : 'warehouse_id'
        },
        {
            type          : 'hasOne',
            associationKey: 'type',
            model         : 'WMS.model.entity.UnitType',
            getterName    : 'getType',
            setterName    : 'setType',
            foreignKey    : 'unittype_id'
        },
        {
            type          : 'hasMany',
            associationKey: 'products',
            model         : 'WMS.model.entity.Product'
        }
    ],


    sorters: [
        'id', 'name'
    ],
    //TODO validations


    proxy: {
        type: 'wms',
        url : 'wms/agent/unit'
    }
});

which, is UPDATE action is used generate request to the server with following json object agrageted in request payload

{"data":[{"id":5,"name":"Unit 5","description":"Damn it","warehouse_id":11,"unittype_id":3,"size":0,"maximumSize":408}]}

As you can see I have valid foreign keys attributes to warehouse and to unittype entities.
And this is exactly the same form I receive on the server side. But Unit (Java-class) model (Hibernate) contains type and warehouse properties like this

        @ManyToOne(fetch = FetchType.LAZY, cascade = CascadeType.ALL)
    @JoinColumn(name = "warehouse_id", referencedColumnName = "idWarehouse")
    private Warehouse warehouse;


    @ManyToOne(fetch = FetchType.LAZY, cascade = CascadeType.ALL)
    @JoinColumn(name = "unittype_id", referencedColumnName = "idUnitType")
    private UnitType type;

So the names of properties in json payload object have the same names is name of join columns.

And this is the problem description.
How can I make GSON to convert object from payload to Unit (Java-class object) by using Hibernate in deserialization. I know I have to write custom deserializer but how ? This is the question I can not find answer to.

Or maybe using some kind of typeAdapter ?

Thanks in advance

[mitchellsimoens]

This doesn't sound like an Ext JS question