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Groups prepend empty key/value pair
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I’ve noticed acf adds an empty key/value pair on groups as the first record.
As an example, here’s my group of groups for cities and regions of a particular country. The JSON is at the bottom.This dump:
var_dump(get_field( 'category_info', $custom_fields_selector )['featured_items']['cities']);(which should have a 5 records)Will return this:
array (size=6) '' => null // Where does this come from? 'object_1' => array (size=4) 'select_object_type' => string 'category' (length=8) 'taxonomy' => int 112 'article' => boolean false 'article_anchor' => string '' (length=0) 'object_2' => array (size=4) 'select_object_type' => string 'category' (length=8) 'taxonomy' => int 92 'article' => boolean false 'article_anchor' => string '' (length=0) 'object_3' => array (size=4) 'select_object_type' => string 'category' (length=8) 'taxonomy' => int 43 'article' => boolean false 'article_anchor' => string '' (length=0) 'object_4' => array (size=4) 'select_object_type' => string 'post' (length=4) 'taxonomy' => boolean false 'article' => int 8491 'article_anchor' => string 'Costa Blanca' (length=12) 'object_5' => array (size=4) 'select_object_type' => string 'post' (length=4) 'taxonomy' => boolean false 'article' => int 6975 'article_anchor' => string 'Navarra' (length=7)I have tried re-saving the category page, change values and creating new groups. All of which result in the same behaviour.
When I had this last week I thought it was because I named some fields as single digits (get_field( 'category_info', $custom_fields_selector )['featured_items']['cities']['1']['url']for example), but after starting a new WP installation and database, the issue persists.JSON:
{ "key": "field_6457b347dec09", "label": "Uitgelichte regio's en steden", "name": "featured_items", "aria-label": "", "type": "group", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "layout": "block", "sub_fields": [ { "key": "field_6457b3ccdec0b", "label": "Uitgelichte regio's", "name": "regions", "aria-label": "", "type": "group", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "layout": "block", "sub_fields": [ { "key": "field_645d1d36b4c65", "label": "Regio 1", "name": "", "aria-label": "", "type": "tab", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "placement": "top", "endpoint": 0 }, { "key": "field_6457b437dec0c", "label": "Regio 1", "name": "object_1", "aria-label": "", "type": "group", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "layout": "block", "sub_fields": [ { "key": "field_6457b453dec0d", "label": "Categorie of artikel", "name": "select_object_type", "aria-label": "", "type": "select", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "choices": { "category": "Categoriepagina", "post": "Artikel" }, "default_value": false, "return_format": "", "multiple": 0, "allow_null": 1, "ui": 0, "ajax": 0, "placeholder": "" }, { "key": "field_6457b4aadec0e", "label": "Categorie", "name": "taxonomy", "aria-label": "", "type": "taxonomy", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "taxonomy": "category", "add_term": 0, "save_terms": 0, "load_terms": 0, "return_format": "id", "field_type": "select", "allow_null": 1, "multiple": 0 }, { "key": "field_6457b528dec0f", "label": "Artikel", "name": "article", "aria-label": "", "type": "post_object", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "post_type": [ "post" ], "post_status": [ "publish" ], "taxonomy": "", "return_format": "id", "multiple": 0, "allow_null": 1, "ui": 1 }, { "key": "field_6457b562dec10", "label": "Naam", "name": "article_anchor", "aria-label": "", "type": "text", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "default_value": "", "maxlength": "", "placeholder": "", "prepend": "", "append": "" } ] }, { "key": "field_645d1d49b4c66", "label": "Regio 2", "name": "", "aria-label": "", "type": "tab", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "placement": "top", "endpoint": 0 }, { "key": "field_6457b59cdec11", "label": "Regio 2", "name": "object_2", "aria-label": "", "type": "group", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "layout": "block", "sub_fields": [ { "key": "field_6457b59cdec15", "label": "Categorie of artikel", "name": "select_object_type", "aria-label": "", "type": "select", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "choices": { "category": "Categoriepagina", "post": "Artikel" }, "default_value": false, "return_format": "", "multiple": 0, "allow_null": 1, "ui": 0, "ajax": 0, "placeholder": "" }, { "key": "field_6457b59cdec16", "label": "Categorie", "name": "taxonomy", "aria-label": "", "type": "taxonomy", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "taxonomy": "category", "add_term": 0, "save_terms": 0, "load_terms": 0, "return_format": "id", "field_type": "select", "allow_null": 1, "multiple": 0 }, { "key": "field_6457b59cdec17", "label": "Artikel", "name": "article", "aria-label": "", "type": "post_object", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "post_type": [ "post" ], "post_status": [ "publish" ], "taxonomy": "", "return_format": "id", "multiple": 0, "allow_null": 1, "ui": 1 }, { "key": "field_6457b59cdec18", "label": "Naam", "name": "article_anchor", "aria-label": "", "type": "text", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "default_value": "", "maxlength": "", "placeholder": "", "prepend": "", "append": "" } ] }, { "key": "field_645d1d4ab4c67", "label": "Regio 3", "name": "", "aria-label": "", "type": "tab", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "placement": "top", "endpoint": 0 }, { "key": "field_6457b59ddec19", "label": "Regio 3", "name": "object_3", "aria-label": "", "type": "group", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "layout": "block", "sub_fields": [ { "key": "field_6457b59ddec1d", "label": "Categorie of artikel", "name": "select_object_type", "aria-label": "", "type": "select", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "choices": { "category": "Categoriepagina", "post": "Artikel" }, "default_value": false, "return_format": "", "multiple": 0, "allow_null": 1, "ui": 0, "ajax": 0, "placeholder": "" }, { "key": "field_6457b59ddec1e", "label": "Categorie", "name": "taxonomy", "aria-label": "", "type": "taxonomy", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "taxonomy": "category", "add_term": 0, "save_terms": 0, "load_terms": 0, "return_format": "id", "field_type": "select", "allow_null": 1, "multiple": 0 }, { "key": "field_6457b59ddec1f", "label": "Artikel", "name": "article", "aria-label": "", "type": "post_object", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "post_type": [ "post" ], "post_status": [ "publish" ], "taxonomy": "", "return_format": "id", "multiple": 0, "allow_null": 1, "ui": 1 }, { "key": "field_6457b59ddec20", "label": "Naam", "name": "article_anchor", "aria-label": "", "type": "text", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "default_value": "", "maxlength": "", "placeholder": "", "prepend": "", "append": "" } ] }, { "key": "field_645d1d4bb4c68", "label": "Regio 4", "name": "", "aria-label": "", "type": "tab", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "placement": "top", "endpoint": 0 }, { "key": "field_6457b5a0dec21", "label": "Regio 4", "name": "object_4", "aria-label": "", "type": "group", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "layout": "block", "sub_fields": [ { "key": "field_6457b5a0dec25", "label": "Categorie of artikel", "name": "select_object_type", "aria-label": "", "type": "select", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "choices": { "category": "Categoriepagina", "post": "Artikel" }, "default_value": false, "return_format": "", "multiple": 0, "allow_null": 1, "ui": 0, "ajax": 0, "placeholder": "" }, { "key": "field_6457b5a0dec26", "label": "Categorie", "name": "taxonomy", "aria-label": "", "type": "taxonomy", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "taxonomy": "category", "add_term": 0, "save_terms": 0, "load_terms": 0, "return_format": "id", "field_type": "select", "allow_null": 1, "multiple": 0 }, { "key": "field_6457b5a0dec27", "label": "Artikel", "name": "article", "aria-label": "", "type": "post_object", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "post_type": [ "post" ], "post_status": [ "publish" ], "taxonomy": "", "return_format": "id", "multiple": 0, "allow_null": 1, "ui": 1 }, { "key": "field_6457b5a0dec28", "label": "Naam", "name": "article_anchor", "aria-label": "", "type": "text", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "default_value": "", "maxlength": "", "placeholder": "", "prepend": "", "append": "" } ] }, { "key": "field_645d1d4cb4c69", "label": "Regio 5", "name": "", "aria-label": "", "type": "tab", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "placement": "top", "endpoint": 0 }, { "key": "field_6457b5a1dec29", "label": "Regio 5", "name": "object_5", "aria-label": "", "type": "group", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "layout": "block", "sub_fields": [ { "key": "field_6457b5a1dec2d", "label": "Categorie of artikel", "name": "select_object_type", "aria-label": "", "type": "select", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "choices": { "category": "Categoriepagina", "post": "Artikel" }, "default_value": false, "return_format": "", "multiple": 0, "allow_null": 1, "ui": 0, "ajax": 0, "placeholder": "" }, { "key": "field_6457b5a1dec2e", "label": "Categorie", "name": "taxonomy", "aria-label": "", "type": "taxonomy", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "taxonomy": "category", "add_term": 0, "save_terms": 0, "load_terms": 0, "return_format": "id", "field_type": "select", "allow_null": 1, "multiple": 0 }, { "key": "field_6457b5a1dec2f", "label": "Artikel", "name": "article", "aria-label": "", "type": "post_object", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "post_type": [ "post" ], "post_status": [ "publish" ], "taxonomy": "", "return_format": "id", "multiple": 0, "allow_null": 1, "ui": 1 }, { "key": "field_6457b5a1dec30", "label": "Naam", "name": "article_anchor", "aria-label": "", "type": "text", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "default_value": "", "maxlength": "", "placeholder": "", "prepend": "", "append": "" } ] } ] }, { "key": "field_6457b5c1dec31", "label": "Uitgelichte steden", "name": "cities", "aria-label": "", "type": "group", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "layout": "block", "sub_fields": [ { "key": "field_645d1d97c410f", "label": "Stad 1", "name": "", "aria-label": "", "type": "tab", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "placement": "top", "endpoint": 0 }, { "key": "field_6457b5c1dec41", "label": "Stad 1", "name": "object_1", "aria-label": "", "type": "group", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "layout": "block", "sub_fields": [ { "key": "field_6457b5c1dec42", "label": "Categorie of artikel", "name": "select_object_type", "aria-label": "", "type": "select", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "choices": { "category": "Categoriepagina", "post": "Artikel" }, "default_value": false, "return_format": "", "multiple": 0, "allow_null": 1, "ui": 0, "ajax": 0, "placeholder": "" }, { "key": "field_6457b5c1dec43", "label": "Categorie", "name": "taxonomy", "aria-label": "", "type": "taxonomy", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "taxonomy": "category", "add_term": 0, "save_terms": 0, "load_terms": 0, "return_format": "id", "field_type": "select", "allow_null": 1, "multiple": 0 }, { "key": "field_6457b5c1dec44", "label": "Artikel", "name": "article", "aria-label": "", "type": "post_object", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "post_type": [ "post" ], "post_status": [ "publish" ], "taxonomy": "", "return_format": "id", "multiple": 0, "allow_null": 1, "ui": 1 }, { "key": "field_6457b5c2dec45", "label": "Naam", "name": "article_anchor", "aria-label": "", "type": "text", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "default_value": "", "maxlength": "", "placeholder": "", "prepend": "", "append": "" } ] }, { "key": "field_645d2e7dc4110", "label": "Stad 2", "name": "", "aria-label": "", "type": "tab", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "placement": "top", "endpoint": 0 }, { "key": "field_6457b5c2dec46", "label": "Stad 2", "name": "object_2", "aria-label": "", "type": "group", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "layout": "block", "sub_fields": [ { "key": "field_6457b5c2dec47", "label": "Categorie of artikel", "name": "select_object_type", "aria-label": "", "type": "select", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "choices": { "category": "Categoriepagina", "post": "Artikel" }, "default_value": false, "return_format": "", "multiple": 0, "allow_null": 1, "ui": 0, "ajax": 0, "placeholder": "" }, { "key": "field_6457b5c2dec48", "label": "Categorie", "name": "taxonomy", "aria-label": "", "type": "taxonomy", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "taxonomy": "category", "add_term": 0, "save_terms": 0, "load_terms": 0, "return_format": "id", "field_type": "select", "allow_null": 1, "multiple": 0 }, { "key": "field_6457b5c2dec49", "label": "Artikel", "name": "article", "aria-label": "", "type": "post_object", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "post_type": [ "post" ], "post_status": [ "publish" ], "taxonomy": "", "return_format": "id", "multiple": 0, "allow_null": 1, "ui": 1 }, { "key": "field_6457b5c2dec4a", "label": "Naam", "name": "article_anchor", "aria-label": "", "type": "text", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "default_value": "", "maxlength": "", "placeholder": "", "prepend": "", "append": "" } ] }, { "key": "field_645d2e7fc4111", "label": "Stad 3", "name": "", "aria-label": "", "type": "tab", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "placement": "top", "endpoint": 0 }, { "key": "field_6457b5c2dec4b", "label": "Stad 3", "name": "object_3", "aria-label": "", "type": "group", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "layout": "block", "sub_fields": [ { "key": "field_6457b5c2dec4c", "label": "Categorie of artikel", "name": "select_object_type", "aria-label": "", "type": "select", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "choices": { "category": "Categoriepagina", "post": "Artikel" }, "default_value": false, "return_format": "", "multiple": 0, "allow_null": 1, "ui": 0, "ajax": 0, "placeholder": "" }, { "key": "field_6457b5c2dec4d", "label": "Categorie", "name": "taxonomy", "aria-label": "", "type": "taxonomy", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "taxonomy": "category", "add_term": 0, "save_terms": 0, "load_terms": 0, "return_format": "id", "field_type": "select", "allow_null": 1, "multiple": 0 }, { "key": "field_6457b5c2dec4e", "label": "Artikel", "name": "article", "aria-label": "", "type": "post_object", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "post_type": [ "post" ], "post_status": [ "publish" ], "taxonomy": "", "return_format": "id", "multiple": 0, "allow_null": 1, "ui": 1 }, { "key": "field_6457b5c2dec4f", "label": "Naam", "name": "article_anchor", "aria-label": "", "type": "text", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "default_value": "", "maxlength": "", "placeholder": "", "prepend": "", "append": "" } ] }, { "key": "field_645d2e81c4112", "label": "Stad 4", "name": "", "aria-label": "", "type": "tab", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "placement": "top", "endpoint": 0 }, { "key": "field_6457b5c2dec50", "label": "Stad 4", "name": "object_4", "aria-label": "", "type": "group", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "layout": "block", "sub_fields": [ { "key": "field_6457b5c2dec51", "label": "Categorie of artikel", "name": "select_object_type", "aria-label": "", "type": "select", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "choices": { "category": "Categoriepagina", "post": "Artikel" }, "default_value": false, "return_format": "", "multiple": 0, "allow_null": 1, "ui": 0, "ajax": 0, "placeholder": "" }, { "key": "field_6457b5c2dec52", "label": "Categorie", "name": "taxonomy", "aria-label": "", "type": "taxonomy", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "taxonomy": "category", "add_term": 0, "save_terms": 0, "load_terms": 0, "return_format": "id", "field_type": "select", "allow_null": 1, "multiple": 0 }, { "key": "field_6457b5c2dec53", "label": "Artikel", "name": "article", "aria-label": "", "type": "post_object", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "post_type": [ "post" ], "post_status": [ "publish" ], "taxonomy": "", "return_format": "id", "multiple": 0, "allow_null": 1, "ui": 1 }, { "key": "field_6457b5c2dec54", "label": "Naam", "name": "article_anchor", "aria-label": "", "type": "text", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "default_value": "", "maxlength": "", "placeholder": "", "prepend": "", "append": "" } ] }, { "key": "field_645d2e82c4113", "label": "Stad 5", "name": "", "aria-label": "", "type": "tab", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "placement": "top", "endpoint": 0 }, { "key": "field_6457b5c2dec55", "label": "Stad 5", "name": "object_5", "aria-label": "", "type": "group", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "layout": "block", "sub_fields": [ { "key": "field_6457b5c2dec56", "label": "Categorie of artikel", "name": "select_object_type", "aria-label": "", "type": "select", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "choices": { "category": "Categoriepagina", "post": "Artikel" }, "default_value": false, "return_format": "value", "multiple": 0, "allow_null": 1, "ui": 0, "ajax": 0, "placeholder": "" }, { "key": "field_6457b5c2dec57", "label": "Categorie", "name": "taxonomy", "aria-label": "", "type": "taxonomy", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "taxonomy": "category", "add_term": 0, "save_terms": 0, "load_terms": 0, "return_format": "id", "field_type": "select", "allow_null": 1, "multiple": 0 }, { "key": "field_6457b5c2dec58", "label": "Artikel", "name": "article", "aria-label": "", "type": "post_object", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "post_type": [ "post" ], "post_status": [ "publish" ], "taxonomy": "", "return_format": "id", "multiple": 0, "allow_null": 1, "ui": 1 }, { "key": "field_6457b5c2dec59", "label": "Naam", "name": "article_anchor", "aria-label": "", "type": "text", "instructions": "", "required": 0, "conditional_logic": 0, "wrapper": { "width": "", "class": "", "id": "" }, "default_value": "", "maxlength": "", "placeholder": "", "prepend": "", "append": "" } ] } ] } ] }
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