长时间的听众,第一次打电话的人。我已经练习编程大约一年了,现在我正在尝试用Grails构建一个小的CRUD应用程序。在过去的3-4周里,我一直无法更新Grails附带的h2数据库中的记录。我在网上读了很多文章,浏览了Stack Overflow,甚至买了一本名为“Grails in Action”的书作为参考。每个资源都让我相信这应该是相对容易的。我不确定我的问题是在我的视图中(可能是我发布数据的方式),在我的控制器中,还是在我的application.yml中。下面是我的HTML、javascript、控制器、域和application.yml代码。任何帮助都是非常感谢的。
需要注意的几点: 1)当执行更新时,Grails会进行零错误验证。2)更新操作将对象的新属性打印到控制台,但不更新数据库。
注意,javascript函数用于将readOnly属性从true更改为false
<form method="POST" action="../update">
<!--hidden field for contractor id-->
<input name="id" value="${params.id}" hidden>
<div class="row">
<div class="col-15">
<label for="name">Name:</label>
</div>
<div class="col-40">
<input class="readOnly" type="text" id="name" name="name" value="${params.name}" readonly>
</div>
<div class="editIcon">
<i id="editIcon" class="far fa-edit" title="Edit Contractor"></i>
</div>
</div>
<div class="row">
<div class="col-15">
<label for="street">Street:</label>
</div>
<div class="col-40">
<input class="readOnly" type="text" id="street" name="street" value="${params.street}" readonly>
</div>
</div>
<div class="row">
<div class="col-15">
<label for="city">City:</label>
</div>
<div class="col-40">
<input class="readOnly" type="text" id="city" name="city" value="${params.city}" readonly>
</div>
</div>
<div class="row">
<div class="col-15">
<label for="state">State:</label>
</div>
<div class="col-15 removeLeftPadding">
<select id="state" name="state" disabled>
<option value="AL">Alabama</option>
<option value="AK">Alaska</option>
</select>
</div>
<div class="col-05 zip">
<label for="zip">Zip:</label>
</div>
<div class="col-13">
<input class="readOnly" type="text" id="zip" name="zip" value="${params.zip}" readonly>
</div>
</div>
<div class="row">
<div class="col-15">
<label for="paymentType">Payment Type:</label>
</div>
<div>
<select id="paymentType" name="paymentType" disabled>
<option value="1">ACH</option>
<option value="2">Credit Card</option>
</select>
</div>
</div>
<div class="row">
<input type="submit" value="Update">
</div>
</form>JavaScript -我怀疑问题在这里,因为在谷歌开发工具中查看网络选项卡时传递了参数(参见下面的屏幕截图)。
/*When icon edit icon is clicked, set readOnly/disabled values to false and input/icon colors to appropriate colors*/
$( "#editIcon" ).click(function() {
console.log("Edit called.")
if(!clicked){
$( "#name" ).prop('readonly', false)
$( "#street" ).prop('readonly', false)
$( "#city" ).prop('readonly', false)
$( "#state" ).prop('disabled', false)
$( "#zip" ).prop('readonly', false)
$( "#paymentType" ).prop('disabled', false)
//Set input color to black
$( "#name" ).css("color", "black")
$( "#street" ).css("color", "black")
$( "#city" ).css("color", "black")
$( "#state" ).css("color", "black")
$( "#zip" ).css("color", "black")
$( "#paymentType" ).css("color", "black")
//Set icon to red
$("#editIcon").css("color", "red")
clicked = true;
} else{
$( "#name" ).prop('readonly', true)
$( "#street" ).prop('readonly', true)
$( "#city" ).prop('readonly', true)
$( "#state" ).prop('disabled', true)
$( "#zip" ).prop('readonly', true)
$( "#paymentType" ).prop('disabled', true)
//Set input color to black
$( "#name" ).css("color", "gray")
$( "#street" ).css("color", "gray")
$( "#city" ).css("color", "gray")
$( "#state" ).css("color", "gray")
$( "#zip" ).css("color", "gray")
$( "#paymentType" ).css("color", "gray")
//Set icon to red
$("#editIcon").css("color", "#7543b7")
clicked = false;
}
});更新承包商控制器中的操作
def update(Long id){
println("I made it to update for Contractors")
def contractorInstance = Contractor.get(id)
contractorInstance.properties = params
println contractorInstance.validate()
println contractorInstance.errors
if(!contractorInstance.save()){
println 'Contractor did not update.'
} else{
println 'Contractor updated.'
}
println contractorInstance.id //prints id to console
println contractorInstance.name //prints updated name to console
redirect(action: "index")
}在Application.yml中开发数据源
environments:
development:
dataSource:
dbCreate: create-drop
url: jdbc:h2:mem:devDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE
logsql: true #added by PCB on 5/14Dev Tools Screenshot - Form Data Post
承包商域名
class Contractor {
String name
String street
String city
String state
String zip
PaymentType paymentType
static hasMany = [masteragreements: MasterAgreement, contracts: Contract, termsAndConditions: TermsAndConditions]
static constraints = {
}}
编辑:我使用的是Grails版本4.0.3
发布于 2020-06-05 22:28:17
在Grails 4/Hibernate 5.2+中,需要一个事务来写入数据库。在您的示例中,您正在写入一个会话,但从未指示将该会话刷新(写入)到数据库。这会在事务结束或显式调用flush时发生。
最常见的解决方案是将逻辑移动到服务,并在为您管理事务时使用@Transactional或GORM数据服务对方法进行注释。
发布于 2020-06-06 01:52:20
强制刷新(并查看错误)的方法之一是这样做:
if(!instance.save(flush: true)){
instance.errors.allErrors.each { println it }
}https://stackoverflow.com/questions/62206415
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