"You called beginRendering again before calling endRendering"

[doctorpangloss]

I see this a lot now after upgrading to devel iron-router:

Layout.prototype.beginRendering = function () {
  if (this._renderedRegions)
    throw new Error("You called beginRendering again before calling endRendering");
  this._renderedRegions = {};
};

I error there, on the error thrown.

My observations of the state of the app when this error is thrown:

• I will hit the error, and one of the regions in the layout will be rendered, but a different one will not. For example, I'll have this layout:

  <template name="layout">
  {{> yield region='navbar'}}
  
  <div id="container-main" class="container layout-1up">
      {{> yield region='sidebar'}}
  
      <div id="inner-main">
          {{> yield}}
      </div>
  </div>
  </template>
  

  and the main yield will have rendered, the navbar will have not rendered, and I throw the error.

• I'm in a route with a reactive action. This may be a red herring.

  ...
        action: function () {
            // Something reactive:
            if (Meteor.user()) {
                // Dies here:
                this.redirect('some path');
            } else {
                this.render();
            }
        }
  ...
  });
  

[cmather]

Hey @doctorpangloss, I'm not seeing this error. Do you have a small reproduction I can look at? You probably discovered an edge case I haven't seen yet.

[doctorpangloss]

I'm building it out now, I'll follow up here

[cmather]

thks

[doctorpangloss]

K repro'd really minimally.

https://github.com/doctorpangloss/iron-layout-4-repro

This occurs when a redirect takes you back to where you came from.

I think I can help you out with your package, and we may have some more things to chat about. I will message you privately!

[cmather]

oh blasted i see. need to endRendering without causing a flush when the controller stops. will fix that in a second.

[cmather]

thanks for spotting this @doctorpangloss and for the repro! It should be fixed now. Let me know!

[doctorpangloss]

solved in 0.1.2, perfect

[cmather]

sweet!