我正在开发一个从REST API获取数据的应用程序。我正在针对一个具体的类解析json,然后逐步将该段转换为Update
或Insert
(取决于该行是否存在)到SQL数据库中。其中一部分是创建一个唯一标识符列,其中包含SkillId
和AccountId
,恰当地命名为AccountSkillId
。我相信我已将此问题追溯到我Add
的{{1}}部分,因为Repository
有效,但Commit
没有。
Add
的行为就像我传递的实体是空的,但是当我在本地看它时它表明它不是空的:
以下是我的业务层中的代码尝试
Add
以下是我的Repository Abstract Class
public void GetSkills()
{
var dataContext = new LivePersonContext(ConfigurationWrapper.DataConnectionString);
var apiRequest = new OAuthRequest();
var builder = new StringBuilder("");
using (dataContext)
{
var uow = new UnitOfWork(dataContext);
var accountCredentialIds = uow.Accounts.GetAll().Select(c => c.AccountID).ToList();
foreach (var a in accountCredentialIds)
{
var account = a;
try
{
builder.Clear();
var consumerKey = uow.Accounts.GetById(account).ConsumerKey;
var consumerSecret = uow.Accounts.GetById(account).ConsumerSecret;
var token = uow.Accounts.GetById(account).Token;
var tokenSecret = uow.Accounts.GetById(account).TokenSecret;
builder.AppendFormat(ConfigurationWrapper.SkillsUri, account);
var uri = builder.ToString();
var response = apiRequest.OauthRequestResponse(uri, consumerKey, consumerSecret, token,
tokenSecret);
if (response != null)
{
using (var reader = new StreamReader(response.GetResponseStream()))
{
var json = reader.ReadToEnd();
var jsonObj = JsonConvert.DeserializeObject<List<Entity.Skills>>(json);
var currentSkillData = uow.SkillMeta.GetAll().Select(c => c.AccountSkillId).ToList();
foreach (var item in jsonObj)
{
if (item.id != null)
{
var itemId = int.Parse(item.id);
var string2 = item.id + account;
var accountSkillId = int.Parse(string2);
if (currentSkillData.Contains(accountSkillId))
{
var skillUpdate = uow.SkillMeta.GetById(accountSkillId);
// skillUpdate.AccountSkillID = int.Parse(accountSkillId);
//skillUpdate.AccountID = account;
//skillUpdate.SkillID = int.Parse(item.id);
skillUpdate.Name = item.name;
skillUpdate.IsDefault = item.isDefault;
skillUpdate.Description = item.description;
uow.Commit();
}
else
{
var addSkill = new lp_Skill_Meta
{
AccountSkillId = accountSkillId,
AccountId = account,
SkillId = itemId,
Name = item.name,
IsDefault = item.isDefault,
Description = item.description,
//TODO: Verify that they are only ever passing single values
Rel = item.links[0].rel,
Href = item.links[0].href
};
uow.SkillMeta.Add(addSkill);
uow.Commit();
}
}
}
}
}
}
catch (Exception exception)
{
var lEngine = new LoggerEngine{Logger = _logger};
lEngine.Log("ERROR: " + exception);
}
}
}
}
public abstract class Repository<T> : IRepository<T>
where T : class
{
protected DbSet<T> _objectSet;
public Repository(BaseContext context)
{
_objectSet = context.Set<T>();
}
#region IRepository<T> Members
public abstract T GetById(object id);
public IEnumerable<T> GetAll()
{
return _objectSet;
}
public IEnumerable<T> Query(Expression<Func<T, bool>> filter)
{
return _objectSet.Where(filter);
}
public void Add(T entity)
{
_objectSet.Add(entity);
}
public void Remove(T entity)
{
_objectSet.Remove(entity);
}
#endregion
}
是我的DAL中的BaseContext
抽象
这是我想要添加到我的数据库中的实体
DbContext
以下是数据库的架构:
public class lp_Skill_Meta
{
[Key]
public long AccountSkillId { get; set; }
public int AccountId { get; set; }
public int SkillId { get; set; }
public string Name { get; set; }
public bool IsDefault { get; set; }
public string Description { get; set; }
public string Rel { get; set; }
public string Href { get; set; }
}
正如您在图片中看到的那样,当我将实体传递给add并尝试提交更改时,实体不为空。但我仍然得到:
无法将值NULL插入列
CREATE TABLE [dbo].[lp_Skill_Meta]( [AccountSkillId] [bigint] NOT NULL, [AccountId] [int] NOT NULL, [SkillId] [int] NOT NULL, [Name] [varchar](250) NULL, [IsDefault] [bit] NULL, [Description] [varchar](max) NULL, [Rel] [varchar](50) NULL, [Href] [varchar](250) NULL ) ON [PRIMARY]
,表中 `DatabaseName.dbo.lp_Skill_Meta&#39 ;;列不允许空值。插入 失败。\ r \ n声明已经终止。
我现在已经盯着这几个小时了,并且一直在搜索和搜索,并没有看到这种情况(不是说它不在那里),但任何帮助都会令人惊讶。
更新:根据以下评论中的SQL Trace帽子提示,以下是EF正在尝试运行的查询
exec sp_executesql N&#39; INSERT [dbo]。[lp_Skill]([AccountId],[SkillId], [Name],[IsDefault],[Description],[Rel],[Href])VALUES(@ 0,@ 1,@ 2, @ 3,@ 4,@ 5,@ 6)SELECT [AccountSkillId] FROM [dbo]。[lp_Skill] WHERE @@ ROWCOUNT&gt; 0 AND [AccountSkillId] = scope_identity()&#39; ,N&#39; @ 0 int,@ 1 int,@ 2 nvarchar(max),@ 3 bit,@ 4 nvarchar(max),@ 5 nvarchar(max),@ 6 nvarchar(max)&#39; ,@ 0 = 10740014,@ 1 = 6,@ 2 = N&#39;滥用者&#39;,@ 3 = 0,@ 4 = N&#39;滥用者&#39;,@ 5 = N&#39;自&#39 ;,@ 6 = N&#39; https://sales.liveperson.net/api/account/10740014/skills/6&#39;
AccountSkillId不是DB中的标识列,所以这就是为什么它抛出NULL。现在开始搜索如何让它停止将该列标记为标识...
答案 0 :(得分:3)
根据这个问题:Cannot insert the value NULL into column in ASP.NET MVC Entity Framework
答案归结为将[DatabaseGenerated(DatabaseGeneratedOption.None)]
添加到我的实体运行中,就像一个魅力。巨大的呼喊@JeffTreuting指出我使用SQL Trace正确的方向。老实说,我甚至都没想过。再次感谢大家!
public class lp_Skill
{
[Key]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public long AccountSkillId { get; set; }
public int AccountId { get; set; }
public int SkillId { get; set; }
public string Name { get; set; }
public bool IsDefault { get; set; }
public string Description { get; set; }
public string Rel { get; set; }
public string Href { get; set; }
}