Using wordpress Easy Digital Downloads https://wordpress.org/plugins/easy-digital-downloads/, is there a function to update all prices for downloads

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  I am still at learning phase in WordPress. I cannot figure out in ACF which field type should I choose to upload a video file and which code should I write to show it at the front-end. Please look into the below code. I am using the_field('') but it isn't working. Can anyone help

                  <video width="954" height="535" controls class="tm-mb-40">
  
                      <source src="video/wheat-field.mp4" type="video/mp4">   
                        
                      Your browser does not support the video tag.
  
                  </video>
  
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• Query to get Woo products in a parent-children order

  I want to build a MySQL query for a Woo database schema to get simple/variable products, but in a specific order: I want to get them in an ID ASCending order, but when a variable product is met, I want to get the variations exactly below their parent.

  So for a simple product, or the parent of a variable product, the post_type field is set to 'product' and the post_parent field is set to 0. For the children of a variable product (a.k.a variations) the post_type field is set to 'variable_product' and the post_parent field is set to the ID of the parent product.

  So, imagine this desired order:

  ID	post_title	post_type	post_parent
  1100	title1	product	0
  1104	title2	product	0
  1130	title2 - variation1	variable_product	1104
  1200	title2 - variation2	variable_product	1104
  1208	title2 - variation3	variable_product	1104
  1107	title3	product	0
  1111	title4	product	0
  1205	title4 - variation1	variable_product	1111
  1210	title4 - variation4	variable_product	1111
  1430	title4 - variation3	variable_product	1111
  1432	title4 - variation2	variable_product	1111

  So by the above table you see that I want products to be sorted by their ID, until the variation(s) of a product are met, which I want to be placed under their parent, and get sorted themselves by their ID also. So I don't care about titles not being sorted alphabetically (title4-variation4 is sorted above title4 - variation3 because the variations' IDs are sorted in an ascending order).

  So I tried to play a little with ORDER BY ID ASC, post_parent ASC and also ORDER BY ID ASC, post_type ASC because product is sorted alphabetically above variation_product, but I couldn't get them sorted correctly. I always end up with parent products being sorted higher than variations, just because their IDs are smaller.

  SELECT * FROM wp6c_posts WHERE post_type IN ('product', 'product_variation') ORDER BY ID ASC, post_parent ASC;

  Obviously I have to query table wp6c_posts twice, once for the simple/parent products, and then for the variations of the variable products, but I can't think of the correct query.

  Can someone help me with this?
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• Why does update_post_meta change the value of my meta key?

  When I use the update_post_meta() function to change a value of a key:

  • when it's a normal string it works
  • but when the string is the same as a JSON file it appends some extra string.

  For example, when I save this string:

  a:1:{i:1;a:6:{s:5:"index";s:1:"0";s:13:"attachment_id";s:1:"0";s:14:"thumbnail_size";s:0:"";s:4:"name";s:3:"aaa";s:4:"file";s:3:"aaa";s:9:"condition";s:3:"all";}}
  

  It is saved on the wp_postmeta table as:

  s:162;"a:1:{i:1;a:6:{s:5:"index";s:1:"0";s:13:"attachment_id";s:1:"0";s:14:"thumbnail_size";s:0:"";s:4:"name";s:3:"aaa";s:4:"file";s:3:"aaa";s:9:"condition";s:3:"all";}}"
  

  When I use a short string there are no problems. How can solve this?

  My code:

  $edd_files='a:1:{i:1;a:6:{s:5:"index";s:1:"0";s:13:"attachment_id";s:1:"0";s:14:"thumbnail_size";s:0:"";s:4:"name";s:3:"aaa";s:4:"file";s:3:"aaa";s:9:"condition";s:3:"all";}}';
  
  update_post_meta($download_id,'edd_download_files',$edd_files);