ViewComponent/view_component · error · ViewComponent::DuplicateContentError

It looks like a block was provided after calling `with_conte

Error message

It looks like a block was provided after calling `with_content` on COMPONENT, which means that ViewComponent doesn't know which content to use.

To fix this issue, use either `with_content` or a block.

What it means

Error "It looks like a block was provided after calling `with_content` on COMPONENT, which means that ViewComponent doesn't know which content to use. To fix this issue, use either `with_content` or a block." thrown in ViewComponent/view_component.

Source

Thrown at lib/view_component/base.rb:133

      @output_buffer = view_context.output_buffer

      @lookup_context = view_context.lookup_context

      # For content_for
      @view_flow = view_context.view_flow

      # For i18n
      @virtual_path ||= virtual_path

      # Describes the inferred request constraints (locales, formats, variants)
      @__vc_requested_details = @lookup_context.vc_requested_details

      # For caching, such as #cache_if
      @current_template = nil unless defined?(@current_template)
      old_current_template = @current_template

      if block && defined?(@__vc_content_set_by_with_content)
        raise DuplicateContentError.new(self.class.name)
      end

      @__vc_content_evaluated = false
      remove_instance_variable(:@__vc_content) if defined?(@__vc_content)
      @__vc_render_in_block = block
      @view_context.instance_variable_set(:@virtual_path, virtual_path)

      before_render

      if render?
        value = nil

        @output_buffer.with_buffer do
          inner_rendered_template = nil
          around_rendered_template = around_render do
            inner_rendered_template = render_template_for(@__vc_requested_details).to_s
          end

View on GitHub (pinned to 9f22c36fa7)

Solutions

1. Pass content either with `with_content(value)` or with a render block, but not both: remove the block if you called `with_content`, or remove the `with_content` call if you render with a block.
2. Example: render(MyComponent.new) { 'content' } OR render(MyComponent.new.with_content('content')).

When it happens

Trigger: Thrown at lib/view_component/base.rb:133 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of ViewComponent/view_component@9f22c36fa7 (2026-08-23). Data as JSON: /api/errors/de0238e4b1101b00. Report an issue: GitHub.