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POService override when component is based on interface produces There is already a component with that name
 

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    <p>From<a href="http://docs.castleproject.org/Windsor.Registering-components-one-by-one.ashx#Supplying_the_component_for_a_dependency_to_use_Service_override_9" rel="nofollow">here</a> I understand how to specify a component, but what if the component implements an interface that itself is resolved in the container?</p> <p>I use three interfaces: <code>IDBViewerModel</code>, <code>IMembershipModel</code> and <code>IMongoConnection</code>. I wish to resolve <code>IDBViewerModel</code> to <code>DBViewerModel</code> and <code>IMembershipModel</code> to <code>MembershipModel</code>. Easy enough. </p> <p>However, both <code>DBViewerModel</code> and <code>MembershipModel</code> expect <code>IMongoConnection</code> as contructor-injected component - and the two components are NOT the same so I want to use service override.</p> <p>My example is as follows. <code>DBViewerModel : IDBViewerModel</code> and <code>MembershipModel : IMembershipModel,</code> where <code>DBViewerModel</code> and <code>MembershipModel</code> constructors expect an injected component and look something like: </p> <pre><code>DBViewerModel(IMongoConnection uaxDB) MembershipModel(IMongoConnection dataDB) </code></pre> <p>Now I have <code>MongoConnection : IMongoConnection</code> and <code>MongoConnection</code> looks like:</p> <pre><code>public MongoConnection(string DBlocation, string DB) </code></pre> <p>I wish to supply DBlocation and DB parameters differently for injection of a <code>MongoConnection</code> component into <code>DBViewerModel</code> and <code>MembershipModel</code>. So I try:</p> <pre><code> container.Register(Component .For&lt;IDBViewerModel&gt;() .ImplementedBy&lt;DBViewerModel&gt;() .LifeStyle.PerWebRequest); container.Register(Component .For&lt;IMembershipModel&gt;() .ImplementedBy&lt;MembershipModel&gt;() .LifeStyle.PerWebRequest); container.Register( Component.For&lt;IMongoConnection&gt;() .ImplementedBy&lt;MongoConnection&gt;() .Named("myservice.dataDB") .DependsOn(Property.ForKey("DBlocation").Eq(USERmongoURL), Property.ForKey("DB").Eq(USERmongoCollection)) .LifeStyle.PerWebRequest, Component.For&lt;IMongoConnection&gt;() .ImplementedBy&lt;MongoConnection&gt;() .Named("myservice.uaxDB") .DependsOn(Property.ForKey("DBlocation").Eq(UAXmongoURL), Property.ForKey("DB").Eq(UAXmongoCollection)) .LifeStyle.PerWebRequest, Component.For&lt;DBViewerModel&gt;() .ServiceOverrides(ServiceOverride.ForKey("dataDB").Eq("myservice.dataDB")), Component.For&lt;MembershipModel&gt;() .ServiceOverrides(ServiceOverride.ForKey("uaxDB").Eq("myservice.uaxDB")) ); </code></pre> <p>My error message says it all - and yet I don't know how to resolve my dependency chain properly: </p> <blockquote> <p>Component DBViewerModel could not be registered. There is already a component with that name. Did you want to modify the existing component instead? If not, make sure you specify a unique name.</p> </blockquote>
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