Hibernate Primefaces自动完成文本

早上好

我试图创建一个简单的页面，在下拉列表中列出所有国家，然后，在我选择一个国家后，州的自动完成显示，并在键入3个字符后执行自动完成。这似乎是一个简单的问题

这是我的状态模型

package br.com.danielfc.model;

// Generated 27/08/2015 23:59:43 by Hibernate Tools 4.3.1

import static javax.persistence.GenerationType.IDENTITY;

import java.util.HashSet;
import java.util.Set;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.NamedQuery;
import javax.persistence.OneToMany;
import javax.persistence.Table;

/**
 * State generated by hbm2java
 */
@Entity
@Table(name = "State", catalog = "daniel")
@NamedQuery(name = "State.findStateByName", query = "select s from State s where s.country.iso = :iso and s.name like :name ")
public class State implements java.io.Serializable {

    /**
     * 
     */
    private static final long serialVersionUID = 4498876370214791673L;
    private Integer id;
    private Country country;
    private String name;
    /*Stands for Federative Unit*/
    private String fu;
    private Set<City> cities = new HashSet<City>(0);

    public State() {
    }

    public State(Country country, String name, String fu) {
        this.country = country;
        this.name = name;
        this.fu = fu;
    }

    public State(Country country, String name, String fu, Set<City> cities) {
        this.country = country;
        this.name = name;
        this.fu = fu;
        this.cities = cities;
    }

    @Id
    @GeneratedValue(strategy = IDENTITY)
    @Column(name = "id", unique = true, nullable = false)
    public Integer getId() {
        return this.id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "countryIso", nullable = false, referencedColumnName = "iso")
    public Country getCountry() {
        return this.country;
    }

    public void setCountry(Country country) {
        this.country = country;
    }

    @Column(name = "name", nullable = false, length = 45)
    public String getName() {
        return this.name;
    }

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

    @Column(name = "fu", nullable = false, length = 2)
    public String getFu() {
        return this.fu;
    }

    public void setFu(String fu) {
        this.fu = fu;
    }

    @OneToMany(fetch = FetchType.LAZY, mappedBy = "state")
    public Set<City> getCities() {
        return this.cities;
    }

    public void setCities(Set<City> cities) {
        this.cities = cities;
    }
}

这是我的jsf页面的一部分，我想在前面解释一下这个行为

                    <h:outputLabel for="addressBeanExampleCountry" value="Country:" />
                    <h:panelGroup>
                        <!-- <h:inputText id="addressBeanExampleCountry" maxLength="45" value="#{addressBean.example.country}"/> -->
                        <h:selectOneMenu id="addressBeanExampleCountry" value="#{addressBean.example.country}">
                            <f:selectItem />
                            <f:selectItems itemLabel="#{forgeview:display(_item.name)}" itemValue="#{_item}" value="#{countryBean.all}" var="_item" />
                        </h:selectOneMenu>
                        <h:message for="addressBeanExampleCountry" styleClass="error" />
                    </h:panelGroup>
                    <h:outputText />

                    <h:outputLabel for="addressBeanExampleState" value="State:" rendered="#{not empty addressBean.example.country}"/>
                    <h:panelGroup rendered="#{not empty addressBean.example.country}">
                        <p:autoComplete id="state" value="#{stateBean.state}" completeMethod="#{stateBean.getAllByCountry()}" minQueryLength="3"/>
                        <h:message for="addressBeanExampleState" styleClass="error" />
                    </h:panelGroup>

问题是，在我选择国家后，该方法没有被调用，自动完成也没有显示

怎么了？

---

实现自动完成逻辑的最佳/正确方法是什么？

不要这样混合使用CDI和EJB。创建CDIBean并@Inject或@EJB将您的EJB注入其中。getAllByCountry、String name方法有2个参数，但在EL中调用它时没有任何{stateBean.getAllByCountry}。可能您想从其他bean{addressBean.example.country}获取它们是的，但这是使用forge脚手架过程创建的。尚未调用getAllByCountry，因为未呈现panelgroup。这是上述问题的一部分。为什么在我选择了国家之后，这个小组就不出现了？当你选择了一些在BackingBean中还看不到的东西时，只有当你提交表格的时候。若您想立即看到值，那个么您可以进行部分处理，并更新您的面板，但首先用一些元素将其包装起来。要添加的内容包括：对于和例如对于您现有的。可能还有更多的问题需要解决。创建一个mcve。太吵了。@Kukeltje，什么是MCVE？有什么好文章推荐我吗？我用谷歌搜索了一下，但到目前为止还没有结果。无论如何，谢谢你的提示。

package br.com.danielfc.model;

// Generated 27/08/2015 23:59:43 by Hibernate Tools 4.3.1

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import static javax.persistence.GenerationType.IDENTITY;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;

/**
 * Address generated by hbm2java
 */
@Entity
@Table(name = "Address", catalog = "daniel")
public class Address implements java.io.Serializable {

    /**
     * 
     */
    private static final long serialVersionUID = -7374915404433933232L;
    private Integer id;
    private AddressType addressType;
    private int typeSite;
    private String streetName;
    private String city;
    private String country;
    private String zipcode;

    public Address() {
    }

    public Address(int typeSite) {
        this.typeSite = typeSite;
    }

    public Address(AddressType addressType, int typeSite, String streetName,
            String city, String country, String zipcode) {
        this.addressType = addressType;
        this.typeSite = typeSite;
        this.streetName = streetName;
        this.city = city;
        this.country = country;
        this.zipcode = zipcode;
    }

    @Id
    @GeneratedValue(strategy = IDENTITY)
    @Column(name = "id", unique = true, nullable = false)
    public Integer getId() {
        return this.id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "addressType")
    public AddressType getAddressType() {
        return this.addressType;
    }

    public void setAddressType(AddressType addressType) {
        this.addressType = addressType;
    }

    @Column(name = "typeSite", nullable = false)
    public int getTypeSite() {
        return this.typeSite;
    }

    public void setTypeSite(int typeSite) {
        this.typeSite = typeSite;
    }

    @Column(name = "streetName", length = 45)
    public String getStreetName() {
        return this.streetName;
    }

    public void setStreetName(String streetName) {
        this.streetName = streetName;
    }

    @Column(name = "city", length = 45)
    public String getCity() {
        return this.city;
    }

    public void setCity(String city) {
        this.city = city;
    }

    @Column(name = "country", length = 45)
    public String getCountry() {
        return this.country;
    }

    public void setCountry(String country) {
        this.country = country;
    }

    @Column(name = "zipcode", length = 45)
    public String getZipcode() {
        return this.zipcode;
    }

    public void setZipcode(String zipcode) {
        this.zipcode = zipcode;
    }

}

                    <h:outputLabel for="addressBeanExampleCountry" value="Country:" />
                    <h:panelGroup>
                        <!-- <h:inputText id="addressBeanExampleCountry" maxLength="45" value="#{addressBean.example.country}"/> -->
                        <h:selectOneMenu id="addressBeanExampleCountry" value="#{addressBean.example.country}">
                            <f:selectItem />
                            <f:selectItems itemLabel="#{forgeview:display(_item.name)}" itemValue="#{_item}" value="#{countryBean.all}" var="_item" />
                        </h:selectOneMenu>
                        <h:message for="addressBeanExampleCountry" styleClass="error" />
                    </h:panelGroup>
                    <h:outputText />

                    <h:outputLabel for="addressBeanExampleState" value="State:" rendered="#{not empty addressBean.example.country}"/>
                    <h:panelGroup rendered="#{not empty addressBean.example.country}">
                        <p:autoComplete id="state" value="#{stateBean.state}" completeMethod="#{stateBean.getAllByCountry()}" minQueryLength="3"/>
                        <h:message for="addressBeanExampleState" styleClass="error" />
                    </h:panelGroup>