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PONHibernate - filtering out results based on child-property
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  1. PONHibernate - filtering out results based on child-property
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    copied!<p>I have this code fetching all enabled Groups with their children. The problem I have is that the children can also be disabled but I can't get fluent nhibernate to only fetch groups where <strong>all</strong> childrens are enabled. I assume this is possible but how?</p> <pre><code>public class Group { public bool IsDisabled { get; set; } public string Description { get; set; } public ICollection&lt;ChildType&gt; Children { get; protected set; } } public class ChildType { public bool IsDisabled { get; set; } public string Description { get; set; } } public IList&lt;Group&gt; Search(string searchString) { IQueryOver&lt;Group&gt; query = Session.QueryOver&lt;Group&gt;() .WhereRestrictionOn(x =&gt; x.Description).IsInsensitiveLike(searchString, MatchMode.Start) .Where(x =&gt; !x.IsDisabled) .OrderBy(x =&gt; x.Description).Asc .Fetch(group =&gt; group.Children).Eager; return query .Cacheable() .List(); } </code></pre> <p><strong>Edit:</strong> There is a N:M-relation between children and groups.</p> <p>The following is the solution I used:</p> <pre><code>public class Group { public long Id { get; set; } public bool IsDisabled { get; set; } public string Description { get; set; } public ICollection&lt;ChildType&gt; Children { get; protected set; } } public class ChildType { public long Id { get; set; } public bool IsDisabled { get; set; } public string Description { get; set; } public ICollection&lt;Group&gt; Groups { get; protected set; } } public IList&lt;Group&gt; Search(string searchString) { ChildType child = null; Group group = null; Group joinedGroup = null; var notDisabled = Session.QueryOver.Of&lt;ExaminationType&gt;() .Where(x =&gt; x.IsDisabled) .JoinAlias(x =&gt; x.Groups, () =&gt; joinedGroup ) .Where(x =&gt; joinedGroup == group) .Select(x =&gt; x.Id); IQueryOver&lt;Group&gt; query = Session.QueryOver&lt;Group&gt;() .WhereRestrictionOn(x =&gt; x.Description).IsInsensitiveLike(searchString, MatchMode.Start) .JoinAlias(x =&gt; x.ExaminationTypes, () =&gt; child) .WithSubquery.WhereNotExists(notDisabled) .OrderBy(x =&gt; x.Description).Asc; return query .Cacheable() .List(); } </code></pre>
 

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