编辑：JSON不完整，不得不削减一些
不知何故，一个实体有EntityState＆＃34;已添加＆＃34;从服务器第一次查询时。
我在DBContextInitializer中创建了3个用户。每次我启动应用程序时都会发生这种情况它将处于State＆＃34; Unchanged＆＃34;如果我拨打Manager.rejectChanges()，但我必须手动执行此操作。
如果我不这样做，并保存另一个实体（可能是Team / Order / OrderDetail），则特定用户将被保存为其原始实体的副本，其中包含唯一的键，但名称等相同的值。如果我可能忘记了某些内容，我会检查我的代码十几次，但我不会在任何地方调用此用户实体的任何状态更改。
这是Manager.getChanges的打印件（实体类型为＆＃34;用户＆＃34;）：
[
[
{
"entityAspect": {
"entityGroup": {
"entityManager": {
"serviceName": "api/Breeze/",
"metadataStore": {
"namingConvention": {
"name": "noChange"
},
"localQueryComparisonOptions": {
"name": "caseInsensitiveSQL",
"isCaseSensitive": false,
"usesSql92CompliantStringComparison": true
},
"dataServices": [
{
"serviceName": "api/Breeze/",
"adapterName": null,
"hasServerMetadata": true
}
],
"_resourceEntityTypeMap": {
"Mvls": "Mvl:#MAHN.Model",
"MvlOps": "MvlOP:#MAHN.Model",
"StatusOps": "StatusOP:#MAHN.Model",
"Teams": "Team:#MAHN.Model",
"TeamLeaders": "TeamLeaders:#MAHN.Model",
"Users": "User:#MAHN.Model",
"TeamUsers": "TeamUsers:#MAHN.Model",
"UserRoles": "UserRoles:#MAHN.Model",
"Roles": "Role:#MAHN.Model",
"TeamRoles": "TeamRoles:#MAHN.Model"
},
"_entityTypeResourceMap": {
"Mvl:#MAHN.Model": "Mvls",
"MvlOP:#MAHN.Model": "MvlOps",
"StatusOP:#MAHN.Model": "StatusOps",
"Team:#MAHN.Model": "Teams",
"TeamLeaders:#MAHN.Model": "TeamLeaders",
"User:#MAHN.Model": "Users",
"TeamUsers:#MAHN.Model": "TeamUsers",
"UserRoles:#MAHN.Model": "UserRoles",
"Role:#MAHN.Model": "Roles",
"TeamRoles:#MAHN.Model": "TeamRoles"
},
"_entityTypeMap": {
"User:#MAHN.Model": {
"name": "User:#MAHN.Model",
"shortName": "User",
"namespace": "MAHN.Model",
"defaultResourceName": "Users",
"dataProperties": [
{
"name": "UserId",
"nameOnServer": "UserId",
"dataType": "Int32",
"isNullable": false,
"defaultValue": 0,
"validators": [
{
"validatorName": "required"
},
{
"validatorName": "int32"
}
],
"isPartOfKey": true
},
{
"name": "UserName",
"nameOnServer": "UserName",
"dataType": "String",
"isNullable": true,
"fixedLength": false,
"validators": [
{
"validatorName": "string"
}
],
"isPartOfKey": false
},
{
"name": "Nachname",
"nameOnServer": "Nachname",
"dataType": "String",
"isNullable": true,
"fixedLength": false,
"validators": [
{
"validatorName": "string"
}
],
"isPartOfKey": false
},
{
"name": "Vorname",
"nameOnServer": "Vorname",
"dataType": "String",
"isNullable": true,
"fixedLength": false,
"validators": [
{
"validatorName": "string"
}
],
"isPartOfKey": false
},
{
"name": "OasisLogin",
"nameOnServer": "OasisLogin",
"dataType": "String",
"isNullable": true,
"fixedLength": false,
"validators": [
{
"validatorName": "string"
}
],
"isPartOfKey": false
}
],
"navigationProperties": [
{
"name": "TeamUsers",
"nameOnServer": "TeamUsers",
"entityTypeName": "TeamUsers:#MAHN.Model",
"isScalar": false,
"associationName": "TeamUsers_User",
"foreignKeyNames": [],
"foreignKeyNamesOnServer": [],
"validators": []
},
{
"name": "UserRoles",
"nameOnServer": "UserRoles",
"entityTypeName": "UserRoles:#MAHN.Model",
"isScalar": false,
"associationName": "UserRoles_User",
"foreignKeyNames": [],
"foreignKeyNamesOnServer": [],
"validators": []
}
],
"autoGeneratedKeyType": "Identity",
"validators": []
},
"Team:#MAHN.Model": {
"entityType": {
"name": "Team:#MAHN.Model",
"shortName": "Team",
"namespace": "MAHN.Model",
"defaultResourceName": "Teams",
"autoGeneratedKeyType": "Identity"
},
"_indexMap": {
"1": 1,
"2": 0,
"3": 2,
"4": 3
},
"_entities": [
{
"entityAspect": {
"entityState": {
"_$typeName": "EntityState",
"name": "Unchanged"
},
"isBeingSaved": false,
"originalValues": {},
"_validationErrors": {},
"validationErrorsChanged": {
"name": "validationErrorsChanged_entityAspect",
"_nextUnsubKey": 1
},
"propertyChanged": {
"name": "propertyChanged_entityAspect",
"_nextUnsubKey": 1
},
"_entityKey": {
"entityType": "Team:#MAHN.Model",
"values": [
2
]
},
"wasLoaded": true
}
},
{
"entityAspect": {
"entityState": {
"_$typeName": "EntityState",
"name": "Unchanged"
},
"isBeingSaved": false,
"originalValues": {},
"_validationErrors": {},
"validationErrorsChanged": {
"name": "validationErrorsChanged_entityAspect",
"_nextUnsubKey": 1
},
"propertyChanged": {
"name": "propertyChanged_entityAspect",
"_nextUnsubKey": 1
},
"_entityKey": {
"entityType": "Team:#MAHN.Model",
"values": [
1
]
},
"wasLoaded": true
}
},
{
"entityAspect": {
"entityState": {
"_$typeName": "EntityState",
"name": "Unchanged"
},
"isBeingSaved": false,
"originalValues": {},
"_validationErrors": {},
"validationErrorsChanged": {
"name": "validationErrorsChanged_entityAspect",
"_nextUnsubKey": 1
},
"propertyChanged": {
"name": "propertyChanged_entityAspect",
"_nextUnsubKey": 1
},
"_entityKey": {
"entityType": "Team:#MAHN.Model",
"values": [
3
]
},
"wasLoaded": true
}
},
{
"entityAspect": {
"entityState": {
"_$typeName": "EntityState",
"name": "Unchanged"
},
"isBeingSaved": false,
"originalValues": {},
"_validationErrors": {},
"validationErrorsChanged": {
"name": "validationErrorsChanged_entityAspect",
"_nextUnsubKey": 1
},
"propertyChanged": {
"name": "propertyChanged_entityAspect",
"_nextUnsubKey": 1
},
"_entityKey": {
"entityType": "Team:#MAHN.Model",
"values": [
4
]
},
"wasLoaded": true
}
}
],
"_emptyIndexes": []
},
"TeamLeaders:#MAHN.Model": {
"entityType": {
"name": "TeamLeaders:#MAHN.Model",
"shortName": "TeamLeaders",
"namespace": "MAHN.Model",
"defaultResourceName": "TeamLeaders",
"autoGeneratedKeyType": "Identity"
},
"_indexMap": {
"1": 0
},
"_entities": [
{
"entityAspect": {
"entityState": {
"_$typeName": "EntityState",
"name": "Unchanged"
},
"isBeingSaved": false,
"originalValues": {},
"_validationErrors": {},
"validationErrorsChanged": {
"name": "validationErrorsChanged_entityAspect",
"_nextUnsubKey": 1
},
"propertyChanged": {
"name": "propertyChanged_entityAspect",
"_nextUnsubKey": 1
},
"_entityKey": {
"entityType": "TeamLeaders:#MAHN.Model",
"values": [
1
]
},
"wasLoaded": true
}
}
],
"_emptyIndexes": []
}
},
"_unattachedChildrenMap": {
"map": {}
},
"keyGenerator": {
"_tempIdMap": {},
"nextNumber": -1,
"nextNumberIncrement": -1,
"stringPrefix": "K_"
},
"_hasChanges": true
},
"entityType": {
"name": "User:#MAHN.Model",
"shortName": "User",
"namespace": "MAHN.Model",
"defaultResourceName": "Users",
"autoGeneratedKeyType": "Identity"
},
"_indexMap": {
"1": 2,
"2": 0,
"3": 1
},
"_entities": [
{
"entityAspect": {
"entityState": {
"_$typeName": "EntityState",
"name": "Unchanged"
},
"isBeingSaved": false,
"originalValues": {},
"_validationErrors": {},
"validationErrorsChanged": {
"name": "validationErrorsChanged_entityAspect",
"_nextUnsubKey": 1
},
"propertyChanged": {
"name": "propertyChanged_entityAspect",
"_nextUnsubKey": 1
},
"_entityKey": {
"entityType": "User:#MAHN.Model",
"values": [
2
]
},
"wasLoaded": true
}
},
{
"entityAspect": {
"entityState": {
"_$typeName": "EntityState",
"name": "Unchanged"
},
"isBeingSaved": false,
"originalValues": {},
"_validationErrors": {},
"validationErrorsChanged": {
"name": "validationErrorsChanged_entityAspect",
"_nextUnsubKey": 1
},
"propertyChanged": {
"name": "propertyChanged_entityAspect",
"_nextUnsubKey": 1
},
"_entityKey": {
"entityType": "User:#MAHN.Model",
"values": [
3
]
},
"wasLoaded": true
}
},
null
],
"_emptyIndexes": []
},
"entityState": {
"_$typeName": "EntityState",
"name": "Added"
},
"isBeingSaved": false,
"originalValues": {},
"_validationErrors": {},
"validationErrorsChanged": {
"name": "validationErrorsChanged_entityAspect",
"_nextUnsubKey": 1
},
"propertyChanged": {
"name": "propertyChanged_entityAspect",
"_nextUnsubKey": 1
},
"_entityKey": {
"entityType": "User:#MAHN.Model",
"values": [
1
]
},
"wasLoaded": true
}
}
]
]
我无法从中提取很多信息，但我认为这个特殊部分很奇怪。为什么这个数组中的第三个对象null但是在该数组之后不久就出现了State＆＃34;添加＆＃34;：
"_entities": [
{
"entityAspect": {
"entityState": {
"_$typeName": "EntityState",
"name": "Unchanged"
},
"isBeingSaved": false,
"originalValues": {},
"_validationErrors": {},
"validationErrorsChanged": {
"name": "validationErrorsChanged_entityAspect",
"_nextUnsubKey": 1
},
"propertyChanged": {
"name": "propertyChanged_entityAspect",
"_nextUnsubKey": 1
},
"_entityKey": {
"entityType": "User:#MAHN.Model",
"values": [
2
]
},
"wasLoaded": true
}
},
{
"entityAspect": {
"entityState": {
"_$typeName": "EntityState",
"name": "Unchanged"
},
"isBeingSaved": false,
"originalValues": {},
"_validationErrors": {},
"validationErrorsChanged": {
"name": "validationErrorsChanged_entityAspect",
"_nextUnsubKey": 1
},
"propertyChanged": {
"name": "propertyChanged_entityAspect",
"_nextUnsubKey": 1
},
"_entityKey": {
"entityType": "User:#MAHN.Model",
"values": [
3
]
},
"wasLoaded": true
}
},
null
],
如果有帮助我可以提供更多信息。
答案 0 :(得分：1)
我有同样的问题。我发现导致这种情况的原因是导航属性（很多）包含在结果中。我还在调查这个问题，但看起来像Breeze中的updateRelatedEntityInCollection（）在连接与“主”对象一起收到的关联对象时设置了“已添加”。
function updateRelatedEntityInCollection(relatedEntity, relatedEntities, targetEntity, inverseProperty) {
if (!relatedEntity) return;
// check if the related entity is already hooked up
var thisEntity = relatedEntity.getProperty(inverseProperty.name);
if (thisEntity !== targetEntity) {
// if not - hook it up.
relatedEntities.push(relatedEntity); // <-- THIS WILL SET "ADDED" ON targetEntity
relatedEntity.setProperty(inverseProperty.name, targetEntity);
}
}
答案 1 :(得分：1)
好的，这里有一个错误，服务器上的某些实体图在序列化到客户端时导致虚假的entityState更改。这应该在breeze网站上或通过nuget在v0.74.2中修复。如果这可以纠正您的问题，请告诉我们。
答案 2 :(得分：0)
想要帮助，我可以理解你被困住了。不幸的是，我提供的内容无法取得很大进展。让我们再试一次更简单的问题陈述和例子。
一个好的开始是查看从对服务的简单HTTP调用中的数据。尝试在浏览器地址栏中输入以下内容：
http://localhost:12345/api/your-service/users
您应该看到您创建的三个用户的JSON数据。
现在尝试在客户端上获取它们：
var em = new breeze.EntityManager('api/your-service');
var q = breeze.EntityQuery.from('Users')
.using(em).execute()
.then(querySucceeded)
.fail(queryFailed);
function querySucceeded(data) {
var users = data.results;
var changes = em.getChanges();
var msg = "User count = " + users.length +
"; pending changes = " + changes.length;
alert(msg);
function queryFailed(error) {
alert('Query failed: '+error.message);
}
如果警告框确认您有3个用户且非零待定更改......您有什么东西可以让我们陷入困境。
答案 3 :(得分：0)
我一直在v 0.73.6上测试它，并确保在内部调用“updateRelatedEntityInCollection”方法。
到目前为止，我还没有能够重现entityManager.hasChanges（）返回true或EntityManager.getChanges（）返回任何查询结果的任何实体的问题。
我尝试使用查询“expands”，“loadNavigationProperty”，并更改了QueryOptions.MergeStrategy all而无法重现这一点;所以任何额外的提示都会非常有用。