Grails 按用户 ID 查看和过滤事件

Question

我有一个域类：

类事件{ static belongsTo = [赞助商，旧]

String evento
Date data = new Date()
String local
Sponsor sponsor
Old old

static constraints = {
    data(blank: false)
    local(blank: false)
    evento(blank: false)
}

}

我自动生成视图和控制器（生成视图），现在当我登录时，在我的视图个性化中我有所有事件...如何按用户 ID（登录）过滤结果？

我的页面是：

...
<div id="list-events" class="content scaffold-list" role="main">
        <h1>Agenda</h1>
        <br>
        <table>
        <thead>
                <tr>

                    <g:sortableColumn property="data" controller ="events" title="${message(code: 'events.data.label', default: 'Evento') } " />

                    <g:sortableColumn property="local" controller ="events" title="${message(code: 'events.local.label', default: 'Local')}" />

                    <g:sortableColumn property="evento" controller ="events" title="${message(code: 'events.evento.label', default: 'Data')}" />

                </tr>
            </thead>
            <tbody>
            <g:each in="${eventsInstanceList}" status="i" var="eventsInstance">
                <tr class="${(i % 2) == 0 ? 'even' : 'odd'}">

                    <td><g:link action="show" id="${eventsInstance.id}">${fieldValue(bean: eventsInstance, field: "evento")}</g:link></td>

                    <td>${fieldValue(bean: eventsInstance, field: "local")}</td>

                    <td>${fieldValue(bean: eventsInstance, field: "data")}</td>

                </tr>
            </g:each>
            </tbody>
        </table>
        <div class="pagination">
            <g:paginate total="${eventsInstanceCount ?: 0}" />
        </div>
    </div>
</div>...

并在_form中：

<div class="fieldcontain ${hasErrors(bean: eventsInstance.old, field: 'data', 'error')} required">
<label for="data">
    <g:message code="events.data.label" default="Data" />
    <span class="required-indicator">*</span>
</label>
<g:datePicker name="data" precision="day"  value="${eventsInstance?.data}"  />

* * * *

还有我的控制器：

class EventsController {

static allowedMethods = [save: "POST", update: "PUT", delete: "DELETE"]

def index(Integer max) {
    params.max = Math.min(max ?: 10, 100)
    respond Events.list(params), model:[eventsInstanceCount: Events.count()]
}

def show(Events eventsInstance) {
    respond eventsInstance
}

def create() {
    respond new Events(params)
}

@Transactional
def save(Events eventsInstance) {
    if (eventsInstance == null) {
        notFound()
        return
    }

    if (eventsInstance.hasErrors()) {
        respond eventsInstance.errors, view:'create'
        return
    }

    eventsInstance.save flush:true

    request.withFormat {
        form {
            flash.message = message(code: 'default.created.message', args: [message(code: 'eventsInstance.label', default: 'Events'), eventsInstance.id])
            redirect eventsInstance
        }
        '*' { respond eventsInstance, [status: CREATED] }
    }
}

def edit(Events eventsInstance) {
    respond eventsInstance
}

@Transactional
def update(Events eventsInstance) {
    if (eventsInstance == null) {
        notFound()
        return
    }

    if (eventsInstance.hasErrors()) {
        respond eventsInstance.errors, view:'edit'
        return
    }

    eventsInstance.save flush:true

    request.withFormat {
        form {
            flash.message = message(code: 'default.updated.message', args: [message(code: 'Events.label', default: 'Events'), eventsInstance.id])
            redirect eventsInstance
        }
        '*'{ respond eventsInstance, [status: OK] }
    }
}

@Transactional
def delete(Events eventsInstance) {

    if (eventsInstance == null) {
        notFound()
        return
    }

    eventsInstance.delete flush:true

    request.withFormat {
        form {
            flash.message = message(code: 'default.deleted.message', args: [message(code: 'Events.label', default: 'Events'), eventsInstance.id])
            redirect action:"index", method:"GET"
        }
        '*'{ render status: NO_CONTENT }
    }
}

protected void notFound() {
    request.withFormat {
        form {
            flash.message = message(code: 'default.not.found.message', args: [message(code: 'eventsInstance.label', default: 'Events'), params.id])
            redirect action: "index", method: "GET"
        }
        '*'{ render status: NOT_FOUND }
    }
}

}

如何过滤与特定登录相关联的每个事件？

谢谢

Answer 1

您需要修改控制器。这是您需要编辑的行：

respond Events.list(params), model:[eventsInstanceCount: Events.count()] 

改成类似

def myEvents = Events.findAllBySponsor(sponsor, params)
def allMyEventsCount = Events.countBySponsor(sponsor)
respond myEvents, model:[eventsInstanceCount: allMyEventsCount] 

其中赞助商是您要过滤的用户。 （我假设登录用户是活动赞助商）

请注意，如果您有多个事件的指定排序参数具有相同的值，则在您刷新或翻阅结果时，您的结果可能不会保持相同的顺序。防止这种情况的一种方法是使用多个排序标准，其中一个始终位于唯一值属性上，例如数据库 ID。我通常使用 Criteria 来实现这一点。我可以推荐你http://grails.org/doc/latest/guide/GORM.html#querying。