No context to render liquid when a picture tag is used in a _layout file

[bryanbergman]

When I try to run Jekyll, I get Liquid Exception: undefined method[]' for nil:NilClass in post.html`

A traceback shows /Users/Bryan/Desktop/sl/_plugins/picture_tag.rb:42:inrender': undefined method []' for nil:NilClass (NoMethodError)

post.html is in my _layouts, I wonder if that is affecting it.

``html {% include header.html %}

    {% picture articleimg {{ page.title }} alt="yep" %}

    <div class="wrapper">

        <article class="post">

            <header>
                <h1><a href="{{ page.url }}">{{ page.title }}</a></h1>
                <p><time datetime="{{ page.date | date: "%Y-%m-%d" }}">{{ page.date | date: "%B %d, %Y" }}</time></p>
                <p>By <a href="http://twitter.com/bryanbergman/" target="_blank">Bryan Bergman</a></p>
                <p>Reading time: <strong>{{ page.reading-time }}</strong></p>
            </header>

            {{ content }}

        </article>

        <div class="all"><a href="{{ site.url }}/archives">See all posts &rarr;</a></div>

    </div>

{% include footer.html %}

[robwierzbowski]

Can you post your picture settings from _config.yml?

Line 42 deals with getting the preset settings from config.yml. Last time I saw this error someone was missing the required default preset, so that's a possibility.

[bryanbergman]

picture:
  source: post_img
  output: generated
  markup: "picturefill"
  presets:
    default:
      attr:
        class: "post-img"
      source_default:
        width: "360"
        height: "771"
      source_720:
        width: "720"
        media: "(min-device-pixel-ratio: 1.5)"
      source_430:
        width: "430"
        media: "(min-width: 360px)"
      source_860:
        width: "860"
        media: "(min-width: 360px) and (min-device-pixel-ratio: 1.5)"
      source_500:
        width: "500"
        media: "(min-width: 430px)"
      source_1000:
        width: "1000"
        media: "(min-width: 430px) and (min-device-pixel-ratio: 1.5)"
      source_640:
        width: "640"
        media: "(min-width: 500px)"
      source_1280:
        width: "1280"
        media: "(min-width: 500px) and (min-device-pixel-ratio: 1.5)"
    articleimg:
      attr:
        class: "post-img"
      source_1200:
        width: "1200"
        media: "(min-width: 940px)"
      source_940:
        width: "940"
        media: "(min-width: 780px)"
      source_780:
        width: "780"
        media: "(min-width: 600px)"
      source_600:
        width: "600"
        media: "(min-width: 470px)"
      source_470:
        width: "470"
        media: "(min-width: 360px)"
      source_default:
        width: "360"

[robwierzbowski]

It looks like you're right. There's an issue with the context variable used to render liquid inside the tag when the tag is used in a layout — it's either not getting picked up properly or doesn't exist. I'll take a look into this, see what I can find.

[patrickcate]

I'm getting this same error. Have a solution been found?

[robwierzbowski]

This would be something to ask about in the Jekyll queue. Last time I checked, context just wasn't available in layouts the same way as in posts.

[patrickcate]

So if I put the {% picture %} tag in the post rather than the layout, it should work?

[robwierzbowski]

It sure should.

Rob Wierzbowski @robwierzbowski http://twitter.com/#!/robwierzbowski http://github.com/robwierzbowski http://robwierzbowski.com

On Fri, Feb 28, 2014 at 4:22 PM, PatrickC8t notifications@github.comwrote:

So if I put the {% picture %} tag in the post rather than the layout, it should work?

Reply to this email directly or view it on GitHubhttps://github.com/robwierzbowski/jekyll-picture-tag/issues/11#issuecomment-36395724 .

[patrickcate]

I think I've gotten around the issue by using https://github.com/rustygeldmacher/jekyll-contentblocks

[maziarzamani]

I have the same issue, cant really use any of the presets, it keeps falling back to the default.

[robwierzbowski]

For now, contentblocks is the preferred fix.

[anroots]

After installing the gem, I got undefined method '[]' for nil:NilClass error when compiling. Defining the default preset in _config.yml solved this.

Adding a more informative exception message ("Default preset configuration not defined") would be beneficial to new users.

[ChrisChinchilla]

I can confirm that @anroots suggestion worked for me to. Though I have another issue know, not sure if it's related…