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Filter sources operators

When you add a filter to a card or slider, you pick a source (what data to check) and an operator (how to compare). The available operators change based on the source’s data type. This page lists every source category and every operator in GuideForms.

Filter sources

Sources are grouped in the dropdown by category. GuideForms detects which plugins are active on your site and only shows the relevant groups.

Post Fields

Built-in WordPress post data. Always available.

  • Post ID — Numeric. The WordPress post ID.
  • Post Title — Text. The post title.
  • Author ID — Numeric. The ID of the post author.
  • Publish Date — Text. The post’s publication date.
  • Post Status — Select. Choices: publish, draft, pending, private.
  • Post Type — Text. The post type slug.
  • Comment Count — Numeric. Number of approved comments.
  • Menu Order — Numeric. The post’s menu order value.

Taxonomies

All public taxonomies registered on your site — categories, tags, and any custom taxonomies. Each taxonomy shows its terms as selectable values in the filter value dropdown. Hierarchical taxonomies display the full path (e.g. “Electronics → Laptops → Gaming Laptops”).

WooCommerce

Available when WooCommerce is active. Includes both taxonomy-based and meta-based sources:

  • Product Categories — Taxonomy. The WooCommerce product category hierarchy.
  • Product Tags — Taxonomy. WooCommerce product tags.
  • Product Attributes — Taxonomy. Any registered product attributes (Color, Size, etc.).
  • Price — Numeric. The product’s current price.
  • Sale Price — Numeric. The product’s sale price (if on sale).
  • Stock Status — Select. Choices: In Stock, Out of Stock, On Backorder.

ACF (Advanced Custom Fields)

Available when ACF is active. Shows all ACF fields from all field groups. The field type is automatically mapped:

  • Text, URL, Email → text operators
  • Number → numeric operators
  • Select, Radio → select operators (with choices from the field config)
  • Checkbox → multi-select operators
  • True/False → boolean (Yes/No choices)
  • Taxonomy → select operators (with term choices)

AAWP (Amazon Affiliate WordPress Plugin)

Available when the AAWP integration is enabled. Amazon product data fields:

  • ASIN — Text. The Amazon product identifier.
  • Price — Numeric. Current Amazon price.
  • Rating — Numeric. Average star rating.
  • Reviews Count — Numeric. Number of customer reviews.
  • Sales Rank — Numeric. Amazon best seller rank.
  • Savings % — Numeric. Discount percentage.
  • Prime — Boolean. Whether the product has Prime shipping.
  • Fulfilled by Amazon — Boolean. FBA status.
  • Binding — Text. Product format (Paperback, Hardcover, etc.).
  • Product Group — Text. Amazon product category.
  • Availability — Text. Current availability status.

Custom Meta

Any custom post meta fields stored in your database. GuideForms scans the postmeta table and shows up to 50 unique non-private meta keys (excluding internal WordPress, ACF, and WooCommerce keys). These are treated as text fields by default.

Operators

The operator determines how the filter value is compared against the indexed data. Available operators depend on the source’s data type.

Text operators

Used for text fields (post title, ACF text, custom meta, AAWP text fields):

  • Equals — Exact match.
  • Not Equals — Anything except this value.
  • Contains — Substring match. The post’s value must contain the filter text anywhere.
  • Exists — The field has any non-empty value.
  • Not Exists — The field is empty or not set.

Numeric operators

Used for number fields (price, rating, ACF number, post ID, comment count):

  • Equals / Not Equals — Exact numeric match.
  • Less Than / Less Than or Equal — Value below a threshold. Common for maximum price filters.
  • Greater Than / Greater Than or Equal — Value above a threshold. Common for minimum rating filters.
  • Between — Value falls within a range (exclusive boundaries).
  • Between (inclusive) — Same as between but includes the boundary values.
  • Outside / Outside (inclusive) — Value falls outside a range.
  • Exists / Not Exists — The field has or lacks a value.

Select operators

Used for taxonomy terms, ACF select/radio fields, and any source with predefined choices:

  • Is Any Of — The post has at least one of the selected values (OR logic). This is the most common operator for taxonomy filters.
  • Is None Of — The post has none of the selected values.
  • Is All Of — The post has every selected value (AND logic). Useful for multi-taxonomy matching — e.g. posts tagged with both “Featured” and “Sale”.
  • Is Not All Of — The post is missing at least one of the selected values.
  • Equals / Not Equals — Single-value exact match.
  • Exists / Not Exists — The field has or lacks any assigned value.

Boolean operators

Used for true/false fields (ACF True/False, AAWP Prime/FBA):

  • Equals — Match Yes or No.
  • Exists — The field has any value set.

Slider-specific operators

When used in a Slider step, the available operators are narrowed to match the slider mode:

  • Single-value slider: Less Than, Less Than or Equal (default), Greater Than, Greater Than or Equal.
  • Range slider: Between (default), Between Inclusive, Outside, Outside Inclusive.

Choosing the right source and operator

  • Category filtering — Source: your taxonomy. Operator: Is Any Of. Assign one or more terms per card.
  • Price range — Source: WooCommerce Price or ACF number field. Use a Slider step with Between operator.
  • Feature toggle — Source: ACF True/False. Operator: Equals Yes. One card enables the filter, another doesn’t.
  • Brand or tag matching — Source: taxonomy. Operator: Is Any Of for single-select cards, or Is All Of when visitors must match multiple tags.
  • Rating threshold — Source: numeric field. Use a Slider with Greater Than or Equal.

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