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POEF Code first + Delete Child Object from Parent?
 

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    <p>I have a one-to-many relationship between my table <code>Case</code> and my other table <code>CaseReplies</code>. I'm using EF Code First and now wants to delete a <code>CaseReply</code> from a Case object, however it seems impossible to do such thing because it just tries to remove the CaseId from the specific CaseReply record and not the record itself..</p> <p>I've tried to set cascade delete/update at database level without luck...</p> <p>short: Case just removes the relationship between itself and the CaseReply.. it does not delete the CaseReply.</p> <p>My code:</p> <p>// Case.cs (Case Object)</p> <pre><code>public class Case { [Key] public int Id { get; set; } public string Topic { get; set; } public string Message { get; set; } public DateTime Date { get; set; } public Guid UserId { get; set; } public virtual User User { get; set; } public virtual ICollection&lt;CaseReply&gt; Replies { get; set; } } </code></pre> <p>// CaseReply.cs (CaseReply Object)</p> <pre><code>public class CaseReply { [Key] public int Id { get; set; } public string Message { get; set; } public DateTime Date { get; set; } public int CaseId { get; set; } public Guid UserId { get; set; } public virtual User User { get; set; } public virtual Case Case { get; set; } } </code></pre> <p>// RepositoryBase.cs</p> <pre><code>public class RepositoryBase&lt;T&gt; : IRepository&lt;T&gt; where T : class { public IDbContext Context { get; private set; } public IDbSet&lt;T&gt; ObjectSet { get; private set; } public RepositoryBase(IDbContext context) { Contract.Requires(context != null); Context = context; if (context != null) { ObjectSet = Context.CreateDbSet&lt;T&gt;(); if (ObjectSet == null) { throw new InvalidOperationException(); } } } public IRepository&lt;T&gt; Remove(T entity) { ObjectSet.Remove(entity); return this; } public IRepository&lt;T&gt; SaveChanges() { Context.SaveChanges(); return this; } } </code></pre> <p>// CaseRepository.cs</p> <pre><code>public class CaseRepository : RepositoryBase&lt;Case&gt;, ICaseRepository { public CaseRepository(IDbContext context) : base(context) { Contract.Requires(context != null); } public bool RemoveCaseReplyFromCase(int caseId, int caseReplyId) { Case caseToRemoveReplyFrom = ObjectSet.Include(x =&gt; x.Replies).FirstOrDefault(x =&gt; x.Id == caseId); var delete = caseToRemoveReplyFrom.Replies.FirstOrDefault(x =&gt; x.Id == caseReplyId); caseToRemoveReplyFrom.Replies.Remove(delete); return Context.SaveChanges() &gt;= 1; } } </code></pre> <p>Thanks in advance.</p>
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      1. POEF Code first + Delete Child Object from Parent?
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    1. COPlease post your object model including any fluent API code that you may have.
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      1. USMorteza Manavi
    2. COI've updated the post with the object models used within the CaseRepository.
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    3. COThis is impossible. You should get an exception as result of the removing since your association is required. Are you sure that *CaseId* on *CaseReply* class is of type `int` and not `int?` ?
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      1. USMorteza Manavi
 

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