Hibernate: detached entity passed to persist

Kleber Mota Published at Dev

Kleber Mota

In my current spring project, when I try store in the database a record based on this entty:

@Entity
@Table(name="produto")
public class Produto {

    @Id
    @Column(name = "id")
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    private Integer id;

    @Column(name="nome", nullable=false, unique=true)
    @Order(value=1)
    private String nome;

    @Column(name="preco", nullable=false)
    @Order(value=2)
    private Float preco;

    @OneToOne(fetch = FetchType.EAGER)
    @JoinColumn(name="categoria")
    @Cascade(value = { org.hibernate.annotations.CascadeType.ALL })
    @Order(value=3)
    private Categoria categoria;

    @Column(name="resumo", length=140)
    @Order(value=4)
    private String resumo;

    @Column(name="descricao", length=65535)
    @Order(value=5)
    private String descricao;
}

I am getting this error: http://www.klebermota.eti.br/wp-content/erro.html

The error is only displayed when I select an item in the select from the form below. If I don't select an option, the record is stored without problem.

<form id="command" class="form" action="/loja/Produto/cadastra" method="POST" enctype="multipart/form-data">
        <div class="row">
            <div class="col-md-3"></div>
            <div class="col-md-6"></div>
            <div class="col-md-3"></div>
        </div>
        <div class="row">
            <div class="col-md-3">
                <h3><label for="nome" class="label label-default">nome</label></h3>
            </div>
            <div class="col-md-6">
                <input id="nome" name="nome" class="form-control" type="text" value=""/>
            </div>
            <div class="col-md-3"></div>
        </div>
        <div class="row">
            <div class="col-md-3">
                <h3><label for="preco" class="label label-default">preco</label></h3>
            </div>
            <div class="col-md-6">
                <input id="preco" name="preco" pattern="[0-9]{3}.[0-9]{2}" class="form-control valida" type="text" value=""/>
            </div>
            <div class="col-md-3"></div>
        </div>
        <div class="row">
            <div class="col-md-3">
                <h3><label for="categoria" class="label label-default">categoria</label></h3>
            </div>
            <div class="col-md-3">

                <select id="categoria.id" name="categoria.id" class="form-control select categoria" data-nome="Categoria" data-lista="/loja/Produto/listagem3.json"></select>
            </div>
            <div class="col-md-3"></div>
        </div>
        <div class="row">
            <div class="col-md-3">
                <h3><label for="resumo" class="label label-default">resumo</label></h3>
            </div>
            <div class="col-md-6">
                <input id="resumo" name="resumo" class="form-control" type="text" value=""/>
            </div>
            <div class="col-md-3"></div>
        </div>
        <div class="row">
            <div class="col-md-3">
                <h3><label for="descricao" class="label label-default">descricao</label></h3>
            </div>
            <div class="col-md-6">
                <textarea id="descricao" name="descricao" class="form-control" rows="25" cols="50"></textarea>
            </div>
            <div class="col-md-3"></div>
        </div>
        <div class="panel panel-default">
            <div class="panel-heading">&iacute;cone do produto (jpeg, 171x180)</div>
            <div class="panel-body">
                <input type="file" name="icone" class="form-control">
            </div>
        </div>
        <div class="panel panel-default">
            <div class="panel-heading">imagem da capa (jpeg, 1280x250)</div>
            <div class="panel-body">
                <input type="file" name="file" class="form-control">
            </div>
        </div>
        <div class="panel panel-default">
            <div class="panel-heading">capturas de tela (jpeg, 960x720)</div>
            <div class="panel-body">
                <p></p>
            </div>
        </div>
        <div class="row">
            <div class="col-md-3"> <button type="submit" class="btn btn-lg btn-primary">cadastrar</button> </div>
            <div class="col-md-3"></div>
        </div>
</form>

Anyone can tell me what's wrong here? I am a bit stucked with this for a while.

Kleber Mota

the working solution for this problem was this configuration for the class:

@Entity
@Table(name="produto")
public class Produto {

    @Id
    @Column(name = "id")
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    private Integer id;

    @Column(name="nome", length=32, nullable=false, unique=true)
    @Order(value=1)
    private String nome;

    @Column(name="titulo", length=32, nullable=false)
    @Order(value=2)
    private String titulo;

    @Column(name="preco")
    @Order(value=3)
    private Float preco;

    @OneToOne
    @JoinColumn(name="categoria")
    @Order(value=4)
    private Categoria categoria;

    @Column(name="descricao", length=65535)
    @Order(value=5)
    private String descricao;

    @Column(name="destaque")
    @Order(value=6)
    private boolean destaque;
}

Now with this I can insert a Produto entity with one selected Categoria. I am trying now solve the insertion without need to select a Categoria.

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