Class: Helm::Query

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/helm/query.rb

Direct Known Subclasses

Helm::Queries::Server

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(conn_string) ⇒ Query

Returns a new instance of Query.



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# File 'lib/helm/query.rb', line 7

def initialize(conn_string)
  @db = Helm.databases[conn_string]
end

Instance Attribute Details

#db ⇒ Object (readonly)

Returns the value of attribute db.



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# File 'lib/helm/query.rb', line 11

def db
  @db
end

#result_class ⇒ Object

Returns the value of attribute result_class.



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# File 'lib/helm/query.rb', line 12

def result_class
  @result_class
end

Instance Method Details

#constraint ⇒ Object 



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# File 'lib/helm/query.rb', line 14

def constraint
  @constraint ||= @db
end

#each ⇒ Object 



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# File 'lib/helm/query.rb', line 22

def each
  constraint.select(*result_class.columns).each do |row|
    yield result_class.new(row)
  end
end

#print ⇒ Object 



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# File 'lib/helm/query.rb', line 18

def print
  constraint.print
end