V 0.1.10 "Cannot read property 'title' of undefined"

[xscheiner]

It looks like v.0.1.10 came out over the weekend. When I got into work on Monday and did an npm install on a fresh vagrant image, I got the following error on startup of my application:

/srv/sites/editor.playto.io/node_modules/derby/node_modules/derby-parsing/lib/index.js:29
throw appendErrorMessage(err, message);
^
TypeError: Cannot read property 'title' of undefined

Within template "TitleElement":
<title><view name="{{$render.prefix}}Title"></view></title>
at viewForTagName (/srv/sites/editor.playto.io/node_modules/derby/node_modules/derby-parsing/lib/index.js:166:59)
at parseHtmlStart (/srv/sites/editor.playto.io/node_modules/derby/node_modules/derby-parsing/lib/index.js:73:35)
at onStartTag (/srv/sites/editor.playto.io/node_modules/derby/node_modules/html-util/lib/parse.js:26:3)
at Object.module.exports as parse
at createTemplate (/srv/sites/editor.playto.io/node_modules/derby/node_modules/derby-parsing/lib/index.js:41:12)
at Template.templates.View._parse (/srv/sites/editor.playto.io/node_modules/derby/node_modules/derby-parsing/lib/index.js:25:18)
at Template.View.parse (/srv/sites/editor.playto.io/node_modules/derby/node_modules/derby-templates/lib/templates.js:185:8)
at Views.serialize (/srv/sites/editor.playto.io/node_modules/derby/node_modules/derby-templates/lib/templates.js:355:42)
at App._viewsSource (/srv/sites/editor.playto.io/node_modules/derby/lib/App.server.js:159:38)
at App.bundle (/srv/sites/editor.playto.io/node_modules/derby/lib/App.server.js:88:26)

The problem goes away when I downgrade to v.0.1.9.

I just started working on this code a few days ago, so I am not totally familiar with it or with Derby for that matter. However, I cannot find anything in the code to match the pattern of the 'TitleElement' template that appears to be being parsed which is what led me to check the dependencies and ultimately to narrow it to derby-templates.

[minicuper]

Use is instead of name-attribute. Also for template one should use 'tag' instead of 'element'.

[xscheiner]

Sorry, is that a comment about the issue or something for me to do?

[minicuper]

I think your error is because of last changes in derby-parsing repo. Nate changed template syntax. So, for example, instead of

<view name="" ></view>

we should write

<view is="" ></view>

[nateps]

@zag2art is correct that the API is changing here, but both are supported for now while I finish working out the kinks in the 0.6.0-alphas.

This issue was my bad. I broke semantic versioning for an internal api shared between derby-templates and derby-parsing, which i think is what broke for you. I republished with both supported. However, you should probably remove the derby folder in your node_modules and fresh install the latest version of derby (0.6.0-alpha27).