Cannot Load An Entity In NHibernate Then Timeout Exception When Table Is Existing
Oct 11, 2010
I got this error while inserting/updating a number of records
could not load an entity:
[Star.CNPL_BusinessObjects.Entities.CNPL.CNPL_AgencyProduct#48][SQL: SELECT cnpl_agenc0_.Id as Id48_0_, cnpl_agenc0_.AgencyID as AgencyID48_0_, cnpl_agenc0_.ProductID as ProductID48_0_, cnpl_agenc0_.CreatedDate as CreatedD4_48_0_, cnpl_agenc0_.CreatedBy as CreatedBy48_0_, cnpl_agenc0_.UpdatedDate as UpdatedD6_48_0_, cnpl_agenc0_.UpdatedBy as UpdatedBy48_0_ FROM CNPL_AgencyProduct cnpl_agenc0_ WHERE cnpl_agenc0_.Id=?]"
[code]...
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Similar Messages:
Oct 14, 2010
I always get this error when the table is existing in the database:
[Code]....
The inner exception of the error is this:
[Code]....
I checked the following for possible errors.
webconfig (both the values of the SQL connection string and the NHibernate connection string are the same)checked the existence of the tables.
Imagine that there are 4 records to be updated/inserted. The first 3 are successful. However, when the last record is to be inserted/updated, the error is thrown.
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Feb 9, 2011
I get an cast exception when i am trying to insert an entity in Entity Framework (using code-first). From this code :
public virtual T Insert(T entity)
{
return Context.Set<T>().Add(entity);
}
The cast exception is like "impossible to cast ...Collection'1(Entity) to type (Entity)" I can't figure out why. I am pretty sure ive done everything right. Post entity
public class Post
{
public long PostId { get; private set; }
public DateTime date { get; set; }
[Required]
public string Subject { get; set; }
public User User { get; set; }
public Category Category { get; set; }
[Required]
public string Body { get; set; }
public virtual ICollection<Tag> Tags { get; private set; }
public Post()
{
Category = new Category();
if (Tags == null)
Tags = new Collection<Tag>();
}................................
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Apr 6, 2010
I am new to Nhibernate, I am trying to get record by ID and I am getting exceptionUnknown entity class: DAL.Producthere is my line of code where I am getting exception..
Repository.Get<Product>(id);
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Apr 16, 2010
I am new to NHibernate and have just started right now.I have very simple table contain Id(Int primary key and auto incremented), Name(varchar(100)), Description(varchar(100))
Here is my XML
<class name="DevelopmentStep" table="DevelopmentSteps" lazy="true">
<id name="Id" type="Int32" column="Id">
</id> [code].....
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Apr 20, 2010
I am excuting SQL Query using Nhibernate, here is my code
public ArrayList getDocumentsForApproval(string ReleaseId)
{
string query = string.Format("SELECT distinct doc.Id, doc.Name as Doc, doc.url as url, suser.Name as Author, ds.name, CONVERT(VARCHAR(11), doc.DateEntered, 101) as DateEntered FROM dbo.Documents doc INNER JOIN DevelopmentSteps ds ON doc.TypeId = ds.Id INNER JOIN DocumentTrackingItems dti ON doc.Id = dti.DocumentId INNER JOIN TrackingItems ti ON dti.ItemStepId = ti.Id INNER JOIN dbo.Releases rl ON ti.ReleaseId = rl.BugTrackerName left outer join (select * from users) as suser on doc.AuthorUserid = suser.Id WHERE doc.DateEntered IS NOT NULL AND doc.DateApproved IS NULL AND rl.ID = '{0}'", ReleaseId);
ISession session = NHibernateHelper.GetCurrentSession();
ArrayList document =(ArrayList) session.CreateSQLQuery(query).List();
return document;
}
Exception Details:
NHibernate.QueryException: Return types of SQL query were not specified [SELECT distinct doc.Id, doc.Name as Doc, doc.url as url, suser.Name as Author, ds.name, CONVERT(VARCHAR(11), doc.DateEntered, 101)
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Oct 26, 2010
Could any one explain me which ORM is best?
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Apr 11, 2010
I've upgraded an ASP.Net Web application to the latest build of Fluent NHibernate (1.0.0.636) and the newest version of NHibernate (v2.1.2.4000). I've checked a couple of times that the application is running in Full trust. But I keep getting the following error:
Security Exception
Description: The application attempted to perform an operation not allowed by the security policy. To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file.
Exception Details: System.Security.SecurityException: Request for the permission of type 'System.Security.Permissions.ReflectionPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[SecurityException: Request for the permission of type 'System.Security.Permissions.ReflectionPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.]
System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet) +0
System.Security.CodeAccessPermission.Demand() +54
System.Reflection.Emit.DynamicMethod.PerformSecurityCheck(Type owner, StackCrawlMark& stackMark, Boolean skipVisibility) +269
System.Reflection.Emit.DynamicMethod..ctor(String name, Type returnType, Type[] parameterTypes, Type owner, Boolean skipVisibility) +81
NHibernate.Bytecode.Lightweight.ReflectionOptimizer.CreateDynamicMethod(Type returnType, Type[] argumentTypes) +165
NHibernate.Bytecode.Lightweight.ReflectionOptimizer.GenerateGetPropertyValuesMethod(IGetter[] getters) +383
NHibernate.Bytecode.Lightweight.ReflectionOptimizer..ctor(Type mappedType, IGetter[] getters, ISetter[] setters) +108
NHibernate.Bytecode.Lightweight.BytecodeProviderImpl.GetReflectionOptimizer(Type mappedClass, IGetter[] getters, ISetter[] setters) +52
NHibernate.Tuple.Component.PocoComponentTuplizer..ctor(Component component) +231
NHibernate.Tuple.Component.ComponentEntityModeToTuplizerMapping..ctor(Component component) +420
NHibernate.Tuple.Component.ComponentMetamodel..ctor(Component component) +402
NHibernate.Mapping.Component.BuildType() +38
NHibernate.Mapping.Component.get_Type() +32
NHibernate.Mapping.SimpleValue.IsValid(IMapping mapping) +39
NHibernate.Mapping.RootClass.Validate(IMapping mapping) +61
NHibernate.Cfg.Configuration.ValidateEntities() +220
NHibernate.Cfg.Configuration.Validate() +16
NHibernate.Cfg.Configuration.BuildSessionFactory() +39
FluentNHibernate.Cfg.FluentConfiguration.BuildSessionFactory() in d:BuildsFluentNHsrcFluentNHibernateCfgFluentConfiguration.cs:93
Anyone had a similar error? I've seach the web / stackoverflow / NHibernate forums but only found people who had a problem when running in medium trust mode, not full trust. I've been developing for several months on this application on this machine with previous versions of Fluent NHibernate and NHibernate.
The machine I'm running this on is 64-bit, you never know that this is relevant.
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Jan 18, 2010
I am tasked to build a web 2.0 style mashup application which consumes a lot of 3rd party webservices like youtube and twitter. There are also lots custom features which are going to be built using ASP.NET 3.5 and SQL Server 2008. Now I am looking for the right ORM for my needs. From a performance and ease of use standpoint can anyone suggest me the right ORM for this kind of web application?
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Apr 30, 2010
I have a dropdown list on an ASP.NET MVC project that I am pretty sure is not binding to my model because of my nhibernate mapping. I have tried many variations on the asp mvc side resulting in this post here.
MVC side of things seems fine I believe the issue may be that my object is trying to bind, but my mapping is out of whack.
My mapping is:
<many-to-one name="Project" lazy="false"
class="AgileThought.ERP.Domain.Property.Project"
column="ProjectGUID" />
My View gives an error saying that the GUID from the dropdownList selected value is not valid. Which I think may be that it is trying to push the GUID into my related project object.
The value 'fd38c877-706f-431d-b624-1269184eeeb5' is invalid.
My related project list binds to the dropdown list just fine, it is just not binding to my models Project entity.
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Jan 29, 2010
am trying to implement fluent nhibernate in MVC project...there were no build errors... but when i run the project i get this exception
System.Xml.Schema.XmlSchemaValidationException: The element 'class' in namespace 'urn:nhibernate-mapping-2.2' has incomplete content. List of possible elements expected: 'meta, subselect, cache, synchronize, comment, tuplizer, id, composite-id' in namespace 'urn:nhibernate-mapping-2.2'.
have no idea what am doing wrong here... the following is the code for opening session factory...
[code]....
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Feb 12, 2010
After googling for couple of days, I really cannot solve described issue. Hope here will find a solution
I'm using attached code when calling WCF service on the same server. I get Timeout error randomly in call WebReq.GetRequestStream()
When I'm check netstat I see that connection remains open, so probably is there a problem, but I don't know how to solve it
//request inicialization
HttpWebRequest WebReq = (HttpWebRequest)WebRequest.Create(url);
WebReq.Method = "POST";
WebReq.ContentType = "application/json; charset=utf-8";
WebReq.ContentLength = buffer.Length;
WebReq.Proxy = null;
WebReq.KeepAlive = false; //also tried with true
WebReq.AllowWriteStreamBuffering = false; //also tried with true
//this produces an error
using (Stream PostData = WebReq.GetRequestStream())
{
PostData.Write(buffer, 0, buffer.Length);
PostData.Close();
}
//open and read response
HttpWebResponse WebResp = (HttpWebResponse)WebReq.GetResponse();
Stream Answer = WebResp.GetResponseStream();
StreamReader _Answer = new StreamReader(Answer);
WebResp.Close();
//return string
return _Answer.ReadToEnd();
Timeout is thrown mostly after some 10 seconds of idle time, but also after five or so requests in the row. Really cannot find a pattern.
What could be wrong with this code? Is there any other (better) way for calling WCF service?
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Jun 11, 2010
How can I update an existing LINQ entity? This code gives me: "Cannot insert an entity that already exists."
Any better practises on updating/inserting with linq?
foreach (ListViewItem lvi in lvStudents.Items)
{
HiddenField hfStudentID = lvi.FindControl("hfID") as HiddenField;
CheckBox cbPresent = lvi.FindControl("mycb") as CheckBox;
int sInt = Int32.Parse(hfStudentID.Value);
dc = new DataClassesSODataContext();//I renewed the dc to make sure that wasn't the problem?
var currStudent = dc.students.Single(x => x.studentID == sInt);
grade g = dc.grades.Single(x => x.subjectID == subjID || x.studentID == sInt);
if (g == null)
{
g = new grade();
g.subject = dc.subjects.Single(x => x.subjectID == subjID);
g.student = currStudent;
g.present = cbPresent.Checked;
dc.grades.InsertOnSubmit(g);
} else
{
g.present = cbPresent.Checked;
dc.grades.Attach(g, true);//I tried both attaching and inserting
}
}
dc.SubmitChanges();
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Jun 25, 2010
I need to create a small web application. The first thing I need to do is to develop the login, logout and user session management functionality. I wanted to use a masterpage and a usercontrol for this purpose. When a user open the page and IS LOGGED IN, the usercontrol should something like this:
"Hello Username! <a>Logout</a>"
And if he is NOT LOGGED IN, the Usercontrol should show something like this
"Login | Logout"
When he clicks on the Login Button the Login-page should be opened. How can I build a Usercontrol which does the above thing. (I have never build a usercontrol and used it in a masterpage before!) The second problem is a little bit komplexer: What happens if the user idles some times and after that time (for example 30minutes) comes back to his pc and wants to execute an action in the web application. Normally he should get an session timeout asp.net exception. I don't want that the user sees this asp.net errorpage, I want to redirect him to the Login Page and he should relogin and gets an error message shown something like "You were timed out. Please login again".
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May 26, 2010
I have a application, and I want to log exceptions to a file and I don't want to change any code. I just want a component to which I can add my code and it will start logging exceptions. How can I do this?
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Feb 2, 2011
I have an ASP.NET application with existing business classes and a database schema. (which I would like to keep) Currently I am using ADO.NET for the DAL, but I would like to switch to some advanced technology there for easier data retrieval.
Is EF applicable to my situation? Can I use it without splitting up my business classes and auto code generation? Can LINQ to SQL solve my problem better?
All I want to do is map my existing classes to the existing tables and dont have to handle details of the data retrieval myself.
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Jan 18, 2011
i am trying to create a temporary table as like an existing table.
create table #tmp AS ( select Table1.* from Table1 where Table1.column name in (select Table2.column name from Table2 where conditions) )
But it is showing Error...
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Feb 11, 2011
I have an ASP.NET 4 web app that is using the Entity Framework to hold, amongst other things, a hierarchical structure of items that is used for features such as navigation.
One of the functions of the application allows the export of a particular branch of the hierarchy tree to XML, generated using a DataContractSerializer. Once exported, the intention is that the XML can then be uploaded to another instance of the same app, deserialized back into EF objects and then added to the data model on the second server.
When I try and import data in this way, I'm finding that I see the following error:
The object could not be added or attached because its EntityReference has an EntityKey property value that does not match the EntityKey for this object.
Taking a closer look at the XML that is generated by the serializer, I can see that the entity key is among the items that has been serialized. Since I'm importing entities that originate from a different database, some of the ID's clash.
What I'd ideally like to be able to do (unless I'm missing something here) is attach the imported entities to an object context and reset the ID's of the objects being imported.
Is there a smart way to do this? Do I simply have to set the ID for each of my imported entities to 0, attach them to the object context and then save changes?
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Sep 6, 2010
No records where inserted in my SQL Table after committing the transaction or after the .Flush() method. I checked the code and it follows the correct sequence of codes. I can't seem to find any other way where the error fails.
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Oct 20, 2010
How can we map a table without having primary key in nHibernate.I have a table which does not contain any primary key, so how can i map this table in .hbm.xml file.
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Feb 16, 2011
We are developing a multi-language web application with ASP.NET MVC 2 and Fluent NHibernate.Our platform will be multi-language. But just static text will be multi-language. Groups pages depends on community content whatever they use. Like Facebook.We decide to keep all language string in database. And load language when application starts.
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Mar 4, 2010
I have two Entity classes: Order and OrderItem. Order contains a navigation property OrderItemSet of type
System.Data.Objects.DataClasses.EntityCollection<OrderItem>
On an aspx page is a FormView bound to this EntityDataSource:
[code]....
When I run the application I get an exception pointing to the line DataSource='<%# Eval("OrderItemSet")%>' in markup and telling me:
DataBinding: System.Web.UI.WebControls.EntityDataSourceWrapper does not contain a property with name 'OrderItemSet'
What is wrong here?
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Sep 9, 2010
I use VS 2010 Ultimate. I created an 'asp.net web application' from scratch, added a 'ADO.NET Entity Model' to my project (EF4).
The problem I'm having is that whenever I try and use an EntityDataSource to pull data out of my entity model I am near constantly getting the following error:
"The metadata specified in the connection string could not be loaded. Consider rebuilding the web project to build assemblies that may contain metadata. The following error(s) occurred:"
[code]....
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May 7, 2015
When processing many records starting from 10,000 System.OutOfMemoryExceptio get the error. There would be some way to handle this type of memory error ?.
ASP.Net SqlBulkCopy- Bulk Insert records and Update existing rows if record exists Exception: Out of Memory Exception C# and VB.Net
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Feb 18, 2010
with fluent nhibernate, is there a way to dynamically switch the table of a mapping at runtime?
public class XYClassMap : ClassMap<XY>
{
public XYClassMap( )
{
Table("XYTable");
Id(d => d.Id).GeneratedBy.Identity();
Map(d => d.Value);
[code]...
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