在grails中保存具有多对多关系的对象
我试图保存具有许多关系的对象。一个销售公司可以有多个帐户,并且一个帐户可以与多个销售公司关联。因此,SellingCompanyAccount中存储的表之间存在许多关系 我的帐户信息域如下所示:在grails中保存具有多对多关系的对象,grails,groovy,save,has-many,Grails,Groovy,Save,Has Many,我试图保存具有许多关系的对象。一个销售公司可以有多个帐户,并且一个帐户可以与多个销售公司关联。因此,SellingCompanyAccount中存储的表之间存在许多关系 我的帐户信息域如下所示: class AccountInfo { static mapping ={ table 'AccountInfo' version false //id column:'accountInfoID' } String evi_p
class AccountInfo {
static mapping ={
table 'AccountInfo'
version false
//id column:'accountInfoID'
}
String evi_pass_phrase
String evi_username
String security_key
// to make sure fields show up in a particular order
static constraints = {
//accountInfoID(insert:false,update:false)
evi_pass_phrase()
evi_username()
security_key()
}
static hasMany = [sellingcompaniesaccount:SellingCompaniesAccount]
String toString() {
return "${evi_username}"
}
}
class SellingCompanies
{
static mapping = {
table 'SellingCompanies'
version false
}
String name
//static belongsTo = AccountInfo
//static hasMany = [accounts: AccountInfo]
static hasMany = [sellingcompaniesaccount:SellingCompaniesAccount]
static constraints = {
name(blank:false, validator:
{ val, obj ->
def similarSellingCompanies = SellingCompanies.findByNameIlike(val)
return !similarSellingCompanies || (obj.id == similarSellingCompanies.id)
})
}
//String toString() { name }
}
class SellingCompaniesAccount {
static constraints = {
// ensure the group of sellingCompaneis and accountInfo values are unique
agency_name(unique:['sellingCompanies','accountInfo'])
}
int agency_id
String agency_name
String consultant_id
String code
Boolean isActive
String iata
ContactInfo contactinfo
static belongsTo = [sellingCompanies:SellingCompanies, accountInfo:AccountInfo]
}
}
我的SellingComapanies域如下:
class AccountInfo {
static mapping ={
table 'AccountInfo'
version false
//id column:'accountInfoID'
}
String evi_pass_phrase
String evi_username
String security_key
// to make sure fields show up in a particular order
static constraints = {
//accountInfoID(insert:false,update:false)
evi_pass_phrase()
evi_username()
security_key()
}
static hasMany = [sellingcompaniesaccount:SellingCompaniesAccount]
String toString() {
return "${evi_username}"
}
}
class SellingCompanies
{
static mapping = {
table 'SellingCompanies'
version false
}
String name
//static belongsTo = AccountInfo
//static hasMany = [accounts: AccountInfo]
static hasMany = [sellingcompaniesaccount:SellingCompaniesAccount]
static constraints = {
name(blank:false, validator:
{ val, obj ->
def similarSellingCompanies = SellingCompanies.findByNameIlike(val)
return !similarSellingCompanies || (obj.id == similarSellingCompanies.id)
})
}
//String toString() { name }
}
class SellingCompaniesAccount {
static constraints = {
// ensure the group of sellingCompaneis and accountInfo values are unique
agency_name(unique:['sellingCompanies','accountInfo'])
}
int agency_id
String agency_name
String consultant_id
String code
Boolean isActive
String iata
ContactInfo contactinfo
static belongsTo = [sellingCompanies:SellingCompanies, accountInfo:AccountInfo]
}
}
包含多个关系的表如下所示:
class AccountInfo {
static mapping ={
table 'AccountInfo'
version false
//id column:'accountInfoID'
}
String evi_pass_phrase
String evi_username
String security_key
// to make sure fields show up in a particular order
static constraints = {
//accountInfoID(insert:false,update:false)
evi_pass_phrase()
evi_username()
security_key()
}
static hasMany = [sellingcompaniesaccount:SellingCompaniesAccount]
String toString() {
return "${evi_username}"
}
}
class SellingCompanies
{
static mapping = {
table 'SellingCompanies'
version false
}
String name
//static belongsTo = AccountInfo
//static hasMany = [accounts: AccountInfo]
static hasMany = [sellingcompaniesaccount:SellingCompaniesAccount]
static constraints = {
name(blank:false, validator:
{ val, obj ->
def similarSellingCompanies = SellingCompanies.findByNameIlike(val)
return !similarSellingCompanies || (obj.id == similarSellingCompanies.id)
})
}
//String toString() { name }
}
class SellingCompaniesAccount {
static constraints = {
// ensure the group of sellingCompaneis and accountInfo values are unique
agency_name(unique:['sellingCompanies','accountInfo'])
}
int agency_id
String agency_name
String consultant_id
String code
Boolean isActive
String iata
ContactInfo contactinfo
static belongsTo = [sellingCompanies:SellingCompanies, accountInfo:AccountInfo]
}
}
create.gsp文件中的表单包含实际迭代所有不同SellingCompany的代码,并显示为复选框
<g:form action="save" method="post">
<div class="dialog">
<table width="500px" border="0px" color="red">
<tbody>
<tr class="prop">
<td valign="top" class="name"><label for="accountInfo"><g:message
code="sellingCompaniesAccount.accountInfo.label"
default="Account Info" /></label></td>
<td valign="top"
class="value ${hasErrors(bean: sellingCompaniesAccountInstance, field: 'accountInfo', 'errors')}">
<g:select name="accountInfo.id"
from="${content_hub_admin.AccountInfo.list()}" optionKey="id"
value="${sellingCompaniesAccountInstance?.accountInfo?.id}" /></td>
</tr>
<tr class="prop">
<td valign="top" class="name"><label for="sellingCompanies"><g:message
code="sellingCompaniesAccount.sellingCompanies.label"
default="Selling Companies" /></label></td>
<td valign="top"
class="">
<g:each in="${content_hub_admin.SellingCompanies.list()}" var="item" status="i">
${++i}. ${item.name} <g:checkBox name="sellingcompanies_${++i-1}" optionKey="id" value="${item.id}" /> <br>
</g:each>
<!-- end here by rsheyeah -->
</td>
</tr>
<tr class="prop">
<td valign="top" class="name"><label for="code"><g:message
code="sellingCompaniesAccount.code.label" default="Code" /></label></td>
<td valign="top"
class="value ${hasErrors(bean: sellingCompaniesAccountInstance, field: 'code', 'errors')}">
<g:textField name="code"
value="${sellingCompaniesAccountInstance?.code}" /></td>
</tr>
<tr class="prop">
<td valign="top" class="name"><label for="agency_name"><g:message
code="sellingCompaniesAccount.agency_name.label"
default="Agencyname" /></label></td>
<td valign="top"
class="value ${hasErrors(bean: sellingCompaniesAccountInstance, field: 'agency_name', 'errors')}">
<g:textField name="agency_name"
value="${sellingCompaniesAccountInstance?.agency_name}" /></td>
</tr>
<tr class="prop">
<td valign="top" class="name"><label for="isActive"><g:message
code="sellingCompaniesAccount.isActive.label" default="Is Active" /></label>
</td>
<td valign="top"
class="value ${hasErrors(bean: sellingCompaniesAccountInstance, field: 'isActive', 'errors')}">
<g:checkBox name="isActive"
value="${sellingCompaniesAccountInstance?.isActive}" /></td>
</tr>
<tr class="prop">
<td valign="top" class="name"><label for="agency_id"><g:message
code="sellingCompaniesAccount.agency_id.label" default="Agencyid" /></label>
</td>
<td valign="top"
class="value ${hasErrors(bean: sellingCompaniesAccountInstance, field: 'agency_id', 'errors')}">
<g:textField name="agency_id"
value="${fieldValue(bean: sellingCompaniesAccountInstance, field: 'agency_id')}" />
</td>
</tr>
<tr class="prop">
<td valign="top" class="name"><label for="iata"><g:message
code="sellingCompaniesAccount.iata.label" default="Iata" /></label></td>
<td valign="top"
class="value ${hasErrors(bean: sellingCompaniesAccountInstance, field: 'iata', 'errors')}">
<g:textField name="iata"
value="${sellingCompaniesAccountInstance?.iata}" /></td>
</tr>
<tr class="prop">
<td valign="top" class="name"><label for="consultant_id"><g:message
code="sellingCompaniesAccount.consultant_id.label"
default="Consultantid" /></label></td>
<td valign="top"
class="value ${hasErrors(bean: sellingCompaniesAccountInstance, field: 'consultant_id', 'errors')}">
<g:textField name="consultant_id"
value="${sellingCompaniesAccountInstance?.consultant_id}" /></td>
</tr>
<tr class="prop">
<td valign="top" class="name"><label for="contactinfo"><g:message
code="sellingCompaniesAccount.contactinfo.label"
default="Contactinfo" /></label></td>
<td valign="top"
class="value ${hasErrors(bean: sellingCompaniesAccountInstance, field: 'contactinfo', 'errors')}">
<g:select name="contactinfo.id"
from="${content_hub_admin.ContactInfo.list()}" optionKey="id"
value="${sellingCompaniesAccountInstance?.contactinfo?.id}" /></td>
</tr>
</tbody>
</table>
</div>
<div class="buttons"><span class="button"><g:submitButton
name="create" class="save"
value="${message(code: 'default.button.create.label', default: 'Create')}" /></span>
</div>
</g:form>
首先,隐藏值从何而来?这种方法可以提交SellingCompanysAccount控制器类中的多个关系信息吗。任何更好的方法
create.gsp在浏览器中解析为:
提前感谢这段代码有问题:
params.each {
if (it.key.contains("_sellingcompanies"))
//sellingCompaniesAccountInstance.sellingCompaniesId << SellingCompanies.get((it.key - "sellingcompanies_") as Integer)
if (it.key.contains("sellingcompanies_"))
sellingCompaniesAccountInstance.sellingCompaniesId << SellingCompanies.get((it.key - "sellingcompanies_") as Integer)
}
循环中的测试首先检查参数键是否包含“\uSellingCompanys”,然后它什么也不做;第二部分检查参数键是否包含“sellingcompanys_u2;”,然后尝试从该参数值中提取带后缀的数字。对于键值为“_sellingcompanies_5”的参数,第一个测试和第二个测试的计算结果均为true,因此在第二个测试中,您将从参数键值中减去“sellingcompanies_”,并留下“_5”,然后尝试将其计算为整数。不幸的是,“_5”不是一个有效的整数值,因此出现了给定的错误
您可以通过执行以下操作非常简单地解决此问题:
params.each {
if (it.key.startsWith("sellingcompanies")) {
sellingCompaniesAccountInstance.sellingCompaniesId << SellingCompanies.get((it.key - "sellingcompanies_") as Integer)
}
}
这应该确保您正确地评估从模型对象传递的适当值,而不是侵入检索方法
希望这有帮助 如果其他人也有同样的问题,那么上面Daniel的回答是绝对正确的,只是添加了Grails 2.7.8中的一些更改 所有复选框都将具有相同的
value=“${item.id}”
和name=“SellingCompanys”
,如下所示:
<!-- ... snip ... -->
<tr class="prop">
<td valign="top" class="name"><label for="sellingCompanies"><g:message
code="sellingCompaniesAccount.sellingCompanies.label"
default="Selling Companies" /></label></td>
<td valign="top"
class="">
<g:each in="${content_hub_admin.SellingCompanies.list()}" var="item" status="i">
${++i}. ${item.name} <g:checkBox name="sellingcompanies" optionKey="id" value="${item.id}" /> <br>
</g:each>
<!-- end here by rsheyeah -->
</td>
</tr>
<!-- ... snip ... -->
${++i}${item.name}
最好的部分是,在当前版本的Grails中,您不需要像Daniel提到的那样使用flatte()作为字符串
,这些值将由Grails自动处理,并保存在联接表中。您只需确保复选框具有正确的名称和值
希望有帮助 您应该限制相关的代码,这有助于其他人更轻松地阅读并理解您的问题。正如日志所指出的,这是一个数据类型错误。你看过SellingCompanysAccountController第70行了吗?谢谢Hoang Long,在调查之后,我发现复选框呈现了一个隐藏字段。如何禁用这个隐藏字段?任何想法。以及如何在SellingCompanyAccount表中为每个选中的复选框添加记录。非常确定隐藏字段在那里,以便您可以“取消选中”复选框。表单无法提交“未选中”的复选框值,因此,如果复选框已选中,但您已取消选中,则必须存在隐藏字段,以让属性解析程序知道该属性过去已被选中。