Class DefaultPagePlugin

reflex/compiler/plugins/builtin.py:163–209

Evaluate an unevaluated page into a mutable page context.

@dataclasses.dataclass(frozen=True, slots=True)
class DefaultPagePlugin(Plugin):
    """Evaluate an unevaluated page into a mutable page context."""

    def eval_page(
        self,
        page_fn: Any,
        /,
        *,
        page: PageDefinition,
        **kwargs: Any,
    ) -> PageContext:
        """Evaluate the page function and attach legacy page metadata.

        Returns:
            The evaluated page context.
        """
        from reflex.compiler import compiler

        try:
            component = compiler.into_component(page_fn)
            component = Fragment.create(component)

            title = getattr(page, "title", None)
            meta_args = {
                "title": (
                    title
                    if title is not None
                    else make_default_page_title(get_config().app_name, page.route)
                ),
                "image": getattr(page, "image", ""),
                "meta": getattr(page, "meta", ()),
            }
            if (description := getattr(page, "description", None)) is not None:
                meta_args["description"] = description

            utils.add_meta(component, **meta_args)
        except Exception as err:
            if hasattr(err, "add_note"):
                err.add_note(f"Happened while evaluating page {page.route!r}")
            raise

        return PageContext(
            name=getattr(page_fn, "__name__", page.route),
            route=page.route,
            root_component=component,
            source_module=getattr(page, "_source_module", None),
        )


@dataclasses.dataclass(frozen=True, slots=True)