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POEmitMapper's List Mapping Issue with Collections
 

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  1. POEmitMapper's List Mapping Issue with Collections
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    <p>The source class:</p> <pre><code>public class Post { public long ID { get; set; } [Column(TypeName="nvarchar")] [Required] [StringLength(250)] public string Name { get; set; } [Column(TypeName="varchar")] [StringLength(250)] public string UrlName { get; set; } [Column(TypeName="ntext")] public string Excerpt { get; set; } [Column(TypeName="ntext")] [Required] public string Content { get; set; } public DateTime PostedTime { get; set; } public DateTime? PublishedTime { get; set; } public DateTime? LastUpdatedTime { get; set; } public bool IsPublished { get; set; } public virtual List&lt;Category&gt; Categories { get; set; } public virtual List&lt;Comment&gt; Comments { get; set; } public virtual List&lt;Tag&gt; Tags { get; set; } } </code></pre> <p>the destination class</p> <pre><code>public class Post : Model { public long ID { get; set; } public string Name { get; set; } public string UrlName { get; set; } public string Excerpt { get; set; } public string Content { get; set; } public DateTime PostedTime { get; set; } public DateTime LastCommentedTime { get; set; } public bool IsPublished { get; set; } public List&lt;Category&gt; Category { get; set; } public List&lt;Comment&gt; Comments { get; set; } public List&lt;Tag&gt; Tags { get; set; } } </code></pre> <p>I try using EmitMapper to map from each other; when mapping from source to desction, here is the code sample：</p> <pre><code>[TestMethod] public void ShouleMapEntityToModel() { Post eP = new Post(); eP.ID = 2; eP.Comments = new List&lt;Comment&gt;(); eP.Comments.Add(new Comment() { ID = 2, Author = "derek" }); var mP = eP.Map&lt;Post, mBlog.Core.Models.Post&gt;(); Assert.IsNotNull(mP); Assert.AreEqual(1, mP.Comments.Count()); } </code></pre> <p>and I got an exception,</p> <p>Test method mBlog.Test.EmitMapperTest.ShouleMapEntityToModel threw exception: System.Exception: Constructor for types [] not found in System.Collections.Generic.IList`1[[mBlog.Core.Models.Post, mBlog.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]</p>
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    1. PO
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    1. This table or related slice is empty.
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    1. USfengd
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
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      1. PTAnswer
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      1. POEmitMapper's List Mapping Issue with Collections
      1. This table or related slice is empty.
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    2. VO
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      1. POEmitMapper's List Mapping Issue with Collections
      1. This table or related slice is empty.
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    3. VO
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      1. POEmitMapper's List Mapping Issue with Collections
      1. This table or related slice is empty.
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    1. COIs Map an extension to Post? If so it would be useful to give it a look to see how you create the mapper
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      1. POEmitMapper's List Mapping Issue with Collections
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    2. COAn easy fix is to put a default constructor and initialize the lists yourself
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      1. POEmitMapper's List Mapping Issue with Collections
      1. USleon
 

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