Re: [hakyll] Provide the Post Body of the Recent 3 Articles

[Jasper Van der Jeugt]

Hey,

You're probably looking for:

copyBodyToField :: String -> Page String -> Page String

You should be able to just use body afterwards (in your postitem template).

Hope this helps,
Peace,
Jasper


On Thu, Sep 20, 2012 at 2:50 AM, Nick Charlton <nickcha...@gmail.com> wrote:
> Hi,
>
> I'm trying to present the most-recent 3 articles on index.html. I can figure
> out how to get a list of titles and links, but not the article body.
>
> Ideally, I'd also reuse the post template (templates/post.html), as it'd be
> exactly the same (rather than using the content of postitem.html, etc.)
>
> I've seen stuff like:
>
> >>> setFieldPageList (take 3 . recentFirst) "templates/postitem.html"
> "posts" "posts/*"
>
> Which has provided me with a list of the more recent three. But, I'm not
> sure you then get the body of the post, inside the template.
>
> What's the best way to go about doing that?
>
> Thanks,
>
> Nick.

[Nick Charlton]

On Thursday, 20 September 2012 00:28:38 UTC+1, jaspervdj wrote:

Hey,

You're probably looking for:

    copyBodyToField :: String -> Page String -> Page String

You should be able to just use body afterwards (in your postitem template).

Ah, hah.

Excuse my ignorance, but how would I go about fitting that into, say your `match "index.html"` block?

match "index.html" $ do

        route idRoute

        compile $ readPageCompiler

            >>> requireA "tags" (setFieldA "tags" (renderTagList'))

            >>> setFieldPageList (take 3 . recentFirst)

                    "templates/postitem.html" "posts" "posts/*"

            >>> arr applySelf

            >>> applyTemplateCompiler "templates/default.html"

            >>> relativizeUrlsCompiler

---

Nick.

[Jasper Van der Jeugt]

Hey,

It would go into the compilation process for your posts, e.g.

match "posts/*" $ do
route ...
compile $
>>> applyTemplateCompiler "templates/post.html"
-- The point at which you do this obviously influences which
-- templates are applied to it
>>> arr copyBodyToField "full"
>>> applyTemplateCompiler "templates/index.html"

And then you can use $full$ in the template you pass to `setFieldPageList`.

Hope this helps,
Peace,
Jasper

[Nick Charlton]

On Friday, 21 September 2012 00:07:27 UTC+1, jaspervdj wrote:

Hey,

It would go into the compilation process for your posts, e.g.

    match "posts/*" $ do
        route ...
        compile $
            >>> applyTemplateCompiler "templates/post.html"
            -- The point at which you do this obviously influences which
            -- templates are applied to it
            >>> arr copyBodyToField "full"
            >>> applyTemplateCompiler "templates/index.html"

And then you can use $full$ in the template you pass to `setFieldPageList`.

Yes! That's perfect. Working great.

I feel like I understand Hakyll a lot more now (examples help a lot.) I'll send out another email when it's finished to add it to the examples pool.

Thanks,

[Jasper Van der Jeugt]

Hello Oli,

This is explained in this tutorial [1]. It is useful to read the
previous tutorials as well, if you haven't done so yet [2].

[1]: http://jaspervdj.be/hakyll/tutorials/04-compilers.html#producing-a-list-of-items
[2]: http://jaspervdj.be/hakyll/tutorials.html

Hope this helps,
Peace,
Jasper

On Mon, Apr 1, 2013 at 6:15 PM, <ozz...@gmail.com> wrote:
> As a newcomer to Haykll I was wondering if someone could explain how to do
> this using Haykll 4?
>
> Looks like this thread so far has dealt with Haykll 3.x
>
> Thanks!
>
> Oli

>
>
> On Wednesday, September 19, 2012 6:50:19 PM UTC+1, Nick Charlton wrote:
>>
>> Hi,
>>
>> I'm trying to present the most-recent 3 articles on index.html. I can
>> figure out how to get a list of titles and links, but not the article body.
>>
>> Ideally, I'd also reuse the post template (templates/post.html), as it'd
>> be exactly the same (rather than using the content of postitem.html, etc.)
>>
>> I've seen stuff like:
>>
>> >>> setFieldPageList (take 3 . recentFirst) "templates/postitem.html"
>> "posts" "posts/*"
>>
>> Which has provided me with a list of the more recent three. But, I'm not
>> sure you then get the body of the post, inside the template.
>>
>> What's the best way to go about doing that?
>>
>> Thanks,
>>
>> Nick.
>

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[Oliver Wilkie]

Hi Jasper,

Thanks for the links, I had already read them!

I had no trouble following those instructions to get a list of post-items (i.e. just the title and date of each post).

I found that through following those instructions I wasn't able to get the $body$ part of a post to be shown. 

Someone on the Hakyll IRC channel was able to show me this example

Site: http://jamesm.com.au/

Source: http://hub.darcs.net/M30W/Blog/browse/site.hs

And so I gleaned from that site.hs what was needed. 

I was a bit confused about what Snapshots are and why they are needed?

It seemed I had to run each post through the pandocCompiler and then save them as snapshots under the name "content".

    match "posts/*" $ do

        route $ setExtension "html"

        compile $ pandocCompiler

            >>= saveSnapshot "content"

            >>= loadAndApplyTemplate "templates/post.html"    postCtx

            >>= loadAndApplyTemplate "templates/default.html" postCtx

            >>= relativizeUrls

Then in creating my index.html I had to set the posts field to be the result of this

postListC sf = do

    posts   <- sf =<< loadAllSnapshots "posts/*" "content"

    itemTpl <- loadBody "templates/post.html"

    list    <- applyTemplateList itemTpl postCtx posts

    return list

Is this the best practice?

Cheers,

Oli

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[Jasper Van der Jeugt]

Yep, that's best practice.

The problem is that if we would just use the $body$ of the posts, this
would already include all templates (e.g. start with an <html> tag).
By using a snapshot, this problem is prevented. A similar problem
arises (and is solved) in this tutorial [1].

[1]: http://jaspervdj.be/hakyll/tutorials/05-snapshots-feeds.html#snapshots

Hope this helps,
Peace,
Jasper