Class: ConceptQL::Operators::Read

Inherits:

Operator

• Object
• Operator
• ConceptQL::Operators::Read

Defined in:

lib/conceptql/operators/read.rb

Defined Under Namespace

Classes: ReadCondition, ReadDrug, ReadObservation, ReadProcedure

Instance Attribute Summary

Attributes inherited from Operator

#arguments, #errors, #nodifier, #options, #upstreams, #values

Instance Method Summary

• #domains(db) ⇒ Object
• #query(db) ⇒ Object

Methods inherited from Operator

#annotate, #cast_column, #code_list, codes_should_match, #columns, #create_upstreams, #data_model, #database_type, default_query_columns, #dup_values, #dynamic_columns, #evaluate, inherited, #initialize, #inspect, #label, new, #operator_name, #optimized, query_columns, register, require_column, #required_columns, #scope, #select_it, #setup_select, #sql, #stream, #to_op, #unionable?, #upstreams_valid?, #valid?

Methods included from Metadatable

#allows_many_upstreams, #allows_one_upstream, #argument, #auto_label, #basic_type, #category, #derive_metadata_from_validations, #desc, #get_desc, #humanized_class_name, #inherited, #just_class_name, #no_desc, #option, #predominant_domains, #pref_name, #preferred_name, #reset_categories, #standard_description, #to_metadata, #validate_at_least_one_upstream_to_metadata, #validate_at_most_one_upstream_to_metadata, #validate_no_arguments_to_metadata, #validate_no_upstreams_to_metadata, #validate_one_upstream_to_metadata, #validate_required_options_to_metadata, #warn_about_missing_metadata

Constructor Details

This class inherits a constructor from ConceptQL::Operators::Operator

Instance Method Details

#domains(db) ⇒ Object

# File 'lib/conceptql/operators/read.rb', line 26

def domains(db)
  codes_by_domain(db).keys
end

#query(db) ⇒ Object

# File 'lib/conceptql/operators/read.rb', line 16

def query(db)
  ops = codes_by_domain(db).map do |domain, codes|
    klasses[domain].new(self.nodifier, *codes)
  end

  streams = ops.map { |op| op.evaluate(db) }

  streams.inject { |q, query| q.union(query, all: true) }.from_self
end