I suggest to use this function to bring all post meta fields with one query: https://codex.wordpress.org/Function_Reference/get_post_custom[enter link description here]1

Use it inside loop, for query all post fields, it's return an array of all post fields.

I suggest to use this function to bring all post meta fields with one query: https://codex.wordpress.org/Function_Reference/get_post_custom

Use it inside loop, for query all post fields, it's return an array of all post fields.