module Mongoid::Matchers::Strategies
This module is responsible for returning the correct matcher given a MongoDB query expression.
Constants
- MATCHERS
Public Instance Methods
matcher(document, key, value)
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Get the matcher for the supplied key and value. Will determine the class name from the key.
@example Get the matcher.
document.matcher(:title, { "$in" => [ "test" ] })
@param [ Document ] document The document to check. @param [ Symbol, String ] key The field name. @param [ Object, Hash ] The value or selector.
@return [ Matcher ] The matcher.
@since 2.0.0.rc.7
# File lib/mongoid/matchers/strategies.rb, line 51 def matcher(document, key, value) if value.is_a?(Hash) matcher = MATCHERS[value.keys.first] if matcher matcher.new(extract_attribute(document, key)) else Default.new(extract_attribute(document, key)) end else case key.to_s when "$or" then Matchers::Or.new(value, document) when "$and" then Matchers::And.new(value, document) else Default.new(extract_attribute(document, key)) end end end
Private Instance Methods
extract_attribute(document, key)
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Extract the attribute from the key, being smarter about dot notation.
@example Extract the attribute.
strategy.extract_attribute(doc, "info.field")
@param [ Document ] document The document. @param [ String ] key The key.
@return [ Object ] The value of the attribute.
@since 2.2.1
# File lib/mongoid/matchers/strategies.rb, line 81 def extract_attribute(document, key) if (key_string = key.to_s) =~ /.+\..+/ key_string.split('.').inject(document.as_document) do |_attribs, _key| if _attribs.is_a?(::Array) _attribs.map { |doc| doc.try(:[], _key) } else _attribs.try(:[], _key) end end else document.attributes[key_string] end end