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<title>detach — Ludic</title>
<meta name="description" content="Structurally remove a property from a live model instance.">
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<div class="crumbs"><a href="api.html">API Reference</a> <span>›</span> <a href="api.html#ecs">Entities &amp; the ECS</a> <span>›</span> <span class="here">detach</span></div>
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<h1 id="top">detach</h1>
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<code class="sig">detach Prop on entity</code>
<div class="desc"><p><code>detach</code> removes a property from a live model instance, firing the property's <code>@OnDetach(Prop)</code> hook <b>before</b> the has-flag clears — so the hook can still read the outgoing field values as it tears down. It is the structural opposite of <code>attach</code>: where <code>disable</code> pauses a property but keeps its data for a later <code>enable</code>, <code>detach</code> genuinely removes the property, and a later <code>attach</code> re-seeds fresh fields from defaults. Detaching a property the instance does not have is a no-op. Reach for it when something is gone for good — a shield consumed, a status effect that has run its course, an ability removed.</p></div>
<div class="examples"><h2>Example</h2><pre data-lang="ludic">program ShieldBreak {
property Position { column: int = 0, row: int = 0 }
property Shield { amount: int = 0 }
model Player { Position, Shield }
handler Boot phase Start {
spawn Hero { Position { column: 6, row: 6 }; Shield { amount: 1 } }
}
handler ConsumeShield phase Update {
for (shield) in query [Shield, {Player}] {
if shield.amount &lt;= 0 { detach Shield on self() }
}
}
}</pre></div>
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