From 2efcf51ab3b8eeae1ab7d8addcd44eef226d77d3 Mon Sep 17 00:00:00 2001
From: Eider Oliveira <eider.oliveira@gmail.com>
Date: Fri, 8 May 2026 14:24:35 -0300
Subject: [PATCH] feat(pagebuilder): add FindContainerByName and GetRenderFunc
 public accessors
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FindContainerByName is the non-panicking variant of ContainerByName — it
returns nil when no container with the given name is registered, making it
safe for public-facing routes where a stale DB row may reference a
container type that has since been removed.

GetRenderFunc exposes the registered render function on ContainerBuilder
so callers outside the pagebuilder (e.g. a public route rendering a
page's containers) can dispatch rendering without duplicating the
model-name to render-function mapping.
---
 pagebuilder/builder.go | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/pagebuilder/builder.go b/pagebuilder/builder.go
index f955d2d23..5db44ff2b 100644
--- a/pagebuilder/builder.go
+++ b/pagebuilder/builder.go
@@ -1010,6 +1010,20 @@ func (b *Builder) ContainerByName(name string) (r *ContainerBuilder) {
 	panic(fmt.Sprintf("No container: %s", name))
 }
 
+// FindContainerByName returns the container builder for the given name,
+// or nil if no container with that name is registered. Unlike
+// ContainerByName it does not panic, making it safe for public-facing
+// routes where a stale DB row may reference a container type that has
+// since been removed.
+func (b *Builder) FindContainerByName(name string) *ContainerBuilder {
+	for _, cb := range b.containerBuilders {
+		if cb.name == name {
+			return cb
+		}
+	}
+	return nil
+}
+
 type ContainerBuilder struct {
 	builder      *Builder
 	name         string
@@ -1226,6 +1240,11 @@ func (b *ContainerBuilder) RenderFunc(v RenderFunc) *ContainerBuilder {
 	return b
 }
 
+// GetRenderFunc returns the registered render function for this container.
+func (b *ContainerBuilder) GetRenderFunc() RenderFunc {
+	return b.renderFunc
+}
+
 func (b *ContainerBuilder) Cover(v string) *ContainerBuilder {
 	b.cover = v
 	return b