[2.2.4] Gallery theme variables being ignored

[gwharton]

(Some) Variables set in the theme's view.xml for the gallery widget appear to be ignored in 2.2.4 (This may also affect other variables, I don't know)

Preconditions

1. Magento 2.2.4 installed from git
2. No modules
3. Single website, theme set to luma

Steps to reproduce

1. Create product and assign product image, ensuring you set the AltText for the image
2. View product on frontend

Expected result

1. as the luma theme sets the variable gallery/caption to false the AltText should not be displayed on the gallery widget.

Actual result

1. The product image has the AltText displayed at the bottom.

This is new behaviour in 2.2.4. 2.2.3 did not do this.

I also have some other third party code that throws a wobbler, when it looks for the variable gallery/fullscreen/navarrows which it says does not exist, even though it is also declared in lumas view.xml

[gwharton]

Debugging from within magento/framework/Config/view.php

    [vars] => Array
        (
            [Magento_Catalog] => Array
                (
                    [gallery] => Array
                        (
                            [nav] => thumbs
                            [loop] => 1
                            [keyboard] => 1
                            [arrows] => 1
                            [caption] => 
                            [allowfullscreen] => 1
                            [navdir] => horizontal
                            [navarrows] => 1
                            [navtype] => slides
                            [transition] => Array
                                (
                                    [effect] => slide
                                    [duration] => 500
                                )

                            [fullscreen] => Array
                                (
                                    [nav] => thumbs
                                    [loop] => 1
                                    [arrows] => 1
                                    [caption] => 
                                    [navdir] => horizontal
                                    [navtype] => slides
                                    [transition] => Array
                                        (
                                            [effect] => slide
                                            [duration] => 500
                                        )

                                    [navarrows] => 
                                )

                        )
                 )
          )

Notice that both Caption and Navarrows are empty, even though in the theme file

        <var name="gallery">
            <var name="nav">thumbs</var> <!-- Gallery navigation style (false/thumbs/dots) -->
            <var name="loop">true</var> <!-- Gallery navigation loop (true/false) -->
            <var name="keyboard">true</var> <!-- Turn on/off keyboard arrows navigation (true/false) -->
            <var name="arrows">true</var> <!-- Turn on/off arrows on the sides preview (true/false) -->
            <var name="caption">false</var> <!-- Display alt text as image title (true/false) -->
            <var name="allowfullscreen">true</var> <!-- Turn on/off fullscreen (true/false) -->
            <var name="navdir">horizontal</var> <!-- Sliding direction of thumbnails (horizontal/vertical) -->
            <var name="navarrows">true</var> <!-- Turn on/off on the thumbs navigation sides arrows(true/false) -->
            <var name="navtype">slides</var> <!-- Sliding type of thumbnails (slides/thumbs) -->
            <var name="transition">
                <var name="effect">slide</var> <!-- Sets transition effect for slides changing (slide/crossfade/dissolve) -->
                <var name="duration">500</var> <!-- Sets transition duration in ms -->
            </var>
            <var name="fullscreen">
                <var name="nav">thumbs</var> <!-- Fullscreen navigation style (false/thumbs/dots) -->
                <var name="loop">true</var> <!-- Fullscreen navigation loop (true/false/null) -->
                <var name="arrows">true</var> <!-- Turn on/off arrows on the sides preview in fullscreen (true/false/null) -->
                <var name="caption">false</var> <!-- Display alt text as image title in fullscreen(true/false) -->
                <var name="navdir">horizontal</var> <!--Sliding direction of thumbnails in fullscreen(horizontal/vertical)  -->
                <var name="navarrows">false</var> <!-- Turn on/off on the thumbs navigation sides arrows(true/false) -->
                <var name="navtype">slides</var> <!-- Sliding type of thumbnails (slides/thumbs) -->
                <var name="transition">
                    <var name="effect">slide</var> <!-- Sets transition effect for slides changing (slide/crossfade/dissolve) -->
                    <var name="duration">500</var> <!-- Sets transition duration in ms -->
                </var>
            </var>
        </var>

It would appear that any item set to false, is not being read properly.

[gwharton]

And here is the culprit

ccc35c2#diff-79786eac5b88f578b5d99c9ca046d4af

Broken during fix applied for #12285

[gwharton]

Should be aware that the changes applied in #12285 were only applied to 2.2-develop and not 2.3-develop. Therefore 2.3-develop continues to use the strings "true" and "false" for boolean config variables and therefore does not require this fix.

Update : I have created forwardports of the 12285 fix into 2.3 so they stay in sync

[magento-engcom-team]

Hi @gwharton. Thank you for your report.
The issue has been fixed in #15022 by @gwharton in 2.3-develop branch
Related commit(s):

• 163d4cc63d19c3a3bd94697dd02c0d96696df799

The fix will be available with the upcoming 2.3.0 release.

[magento-engcom-team]

Hi @gwharton. Thank you for your report.
The issue has been fixed in #15020 by @gwharton in 2.2-develop branch
Related commit(s):

• 8ef039ec281a7fc6af014b42fc69a9d77e4bf277

The fix will be available with the upcoming 2.2.5 release.