grails - 在grails中的多对多关系中使用复选框

Question

我在使用复选框时遇到一个典型的问题。我拥有的是员工和技能。每个员工可以拥有许多技能，并且技能可以属于许多员工。这使它成为多对多关系。

这是我的 Realm 类(class)

class Skill {
    String name
    static hasMany = [users:Employee, resources:Resource]
    static belongsTo = [Employee]

    static constraints = {
        name unique: true, nullable: false, blank: false
    }

    String toString() { return name }
    String getDisplayName() { return name }
}

class Employee {

String name
String surname
Date birthdate
BigDecimal salary
Address address

static hasMany = [skills: Skill]
static belongsTo = [team:Team]

static constraints = {
    address nullable: false, blank: false
    name nullable: false, blank: false, matches: '[a-zA-Z\\-\'\\s]+'
    surname nullable: false, blank: false, matches: '[a-zA-Z\\-\'\\s]+'
    skills nullable: true, blank: true
    salary nullable: false, min: 16000.0, max: 60000.0
    team nullable: true
    birthdate max:new Date(use(TimeCategory){18.years.ago.getTime()})
}

String toString() { return "\nEmployee Information:\n Name: $name\n Surname: $surname\n " +
        "Date of Birth: $birthdate\n Salary: $salary\n"}

}

员工域工作正常，我可以创建一个地址没有任何问题的员工。

但是，当我尝试向员工添加技能时，它也没有做到我所说的。
例如，当我检查两项特定技能时，它会尝试运行并保存，这会将所有技能添加到员工中。

我如何告诉 Controller 仅添加已检查的内容。

这是我在 Controller 中的代码

@Transactional
def create() {
    params.each { println("$it.key -> $it.value") }
    def employee = new Employee(params)
    def address = new Address(params)
    def skills = Skill.list()

    if (params["create"]) {
        if (address.validate()) {
            address.save()
            employee.address = address
            params.remove("_s")
            skills.each { skill -> if (params["s"] != null ) {
                employee.addToSkills(skill)
                }
            }
            if (employee.validate()) {
                employee.save()
                flash.message = "Employee has been successfully created"
                redirect(action: "index")
            }
        } else {
            flash.message = "Ooops Error!!!!"
            render(view: "create", model: [employee: employee, address: address, skill: skills])
        }
    }
    [employee: employee, address: address, skill: skills]
}

这是我的create.gsp

<div class="col-md-6">
<label>Select Your Competences:</label>
   <g:each in="${skill}" var="s" status="i">
    <br/>
    <g:checkBox name="s" value="${s.id}" checked="false"/>
     <label for="s">${s.name}</label>
 </g:each>
 </div>

Answer 1

将您的gsp修改为:

<label>Select Your Competences:</label>
   <g:each in="${Skill.list()}" var="skill" status="i">
    <br/>
    <g:checkBox name="s.${skill}" value="${skill.id}" checked="false"/>
     <label for="s">${skill}</label>
 </g:each>
 </div>

提交此表单时，您将在 Controller 上获得一个具有以下值的参数: [skill:[_MsOffice:'', MsOffice:1, Managing:10, AgileCoach:3, _Coding:'']
要从参数获取检查值的ID，请在 Controller 上执行以下操作:

List<Long> skillIds = new ArrayList<Long>()

  params.skill?.each { s ->

   if(!s.getKey().startsWith("_")) {

    skillIds.add(s.getValue())
   }
  }

现在在 skillIds列表上，您有一个 Skill的 Employee ID列表，
然后将其传递给您的服务并获取技能以添加到 Employee(使用 Skill.getAll(skillIds)或其他gorm操作)

你可以在这里看到示例 http://groovyconsole.appspot.com/script/5722903798611968