fix: Set Context.template for components to work with include (#582)

src/django_components/component.py

@@ -362,15 +362,11 @@ class Component(View, metaclass=ComponentMeta):
         slots: Optional[Mapping[SlotName, SlotContent]] = None,
         escape_slots_content: bool = True,
     ) -> str:
-        # Allow to provide no args/kwargs
-        args = args or []
-        kwargs = kwargs or {}
-
-        # Allow to provide no Context, so we can render component just with args + kwargs
-        context_was_given = True
-        if context is None:
-            context = Context()
-            context_was_given = False
+        # Allow to provide no args/kwargs/slots/context
+        args = args or []  # type: ignore[assignment]
+        kwargs = kwargs or {}  # type: ignore[assignment]
+        slots = slots or {}  # type: ignore[assignment]
+        context = context or Context()
 
         # Allow to provide a dict instead of Context
         # NOTE: This if/else is important to avoid nested Contexts,
@@ -387,9 +383,11 @@ class Component(View, metaclass=ComponentMeta):
         with context.update(context_data):
             template = self.get_template(context)
             _monkeypatch_template(template)
-            if not context_was_given:
+
+            if context.template is None:
                 # Associate the newly-created Context with a Template, otherwise we get
                 # an error when we try to use `{% include %}` tag inside the template?
+                # See https://github.com/EmilStenstrom/django-components/issues/580
                 context.template = template
                 context.template_name = template.name
 

tests/test_component.py

@@ -6,8 +6,8 @@ For tests focusing on the `component` tag, see `test_templatetags_component.py`
 from typing import Dict
 
 from django.core.exceptions import ImproperlyConfigured
-from django.http import HttpResponse
-from django.template import Context, Template, TemplateSyntaxError
+from django.http import HttpRequest, HttpResponse
+from django.template import Context, RequestContext, Template, TemplateSyntaxError
 
 from django_components import Component, registry, types
 from django_components.slots import SlotRef
@@ -448,6 +448,50 @@ class ComponentRenderTest(BaseTestCase):
             """,
         )
 
+    # See https://github.com/EmilStenstrom/django-components/issues/580
+    # And https://github.com/EmilStenstrom/django-components/commit/fee26ec1d8b46b5ee065ca1ce6143889b0f96764
+    @parametrize_context_behavior(["django", "isolated"])
+    def test_render_with_include_and_context(self):
+        class SimpleComponent(Component):
+            template: types.django_html = """
+                {% load component_tags %}
+                {% include 'slotted_template.html' %}
+            """
+
+        rendered = SimpleComponent.render(context=Context())
+        self.assertHTMLEqual(
+            rendered,
+            """
+            <custom-template>
+                <header>Default header</header>
+                <main>Default main</main>
+                <footer>Default footer</footer>
+            </custom-template>
+            """,
+        )
+
+    # See https://github.com/EmilStenstrom/django-components/issues/580
+    # And https://github.com/EmilStenstrom/django-components/commit/fee26ec1d8b46b5ee065ca1ce6143889b0f96764
+    @parametrize_context_behavior(["django", "isolated"])
+    def test_render_with_include_and_request_context(self):
+        class SimpleComponent(Component):
+            template: types.django_html = """
+                {% load component_tags %}
+                {% include 'slotted_template.html' %}
+            """
+
+        rendered = SimpleComponent.render(context=RequestContext(HttpRequest()))
+        self.assertHTMLEqual(
+            rendered,
+            """
+            <custom-template>
+                <header>Default header</header>
+                <main>Default main</main>
+                <footer>Default footer</footer>
+            </custom-template>
+            """,
+        )
+
     @parametrize_context_behavior(["django", "isolated"])
     def test_render_with_extends(self):
         class SimpleComponent(Component):