Class: SimpleQuery::GroupHavingClause

Inherits:
Object
  • Object
show all
Defined in:
lib/simple_query/clauses/group_having_clause.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(table) ⇒ GroupHavingClause

Returns a new instance of GroupHavingClause.



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# File 'lib/simple_query/clauses/group_having_clause.rb', line 7

def initialize(table)
  @table = table
  @group_fields = []
  @having_conditions = []
end

Instance Attribute Details

#group_fields ⇒ Object (readonly)

Returns the value of attribute group_fields.



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# File 'lib/simple_query/clauses/group_having_clause.rb', line 5

def group_fields
  @group_fields
end

#having_conditions ⇒ Object (readonly)

Returns the value of attribute having_conditions.



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# File 'lib/simple_query/clauses/group_having_clause.rb', line 5

def having_conditions
  @having_conditions
end

Instance Method Details

#add_group(*fields) ⇒ Object 



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# File 'lib/simple_query/clauses/group_having_clause.rb', line 13

def add_group(*fields)
  @group_fields.concat(fields.map { |f| @table[f] })
end

#add_having(condition) ⇒ Object 



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# File 'lib/simple_query/clauses/group_having_clause.rb', line 17

def add_having(condition)
  @having_conditions << condition
end

#apply_to(query) ⇒ Object 



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# File 'lib/simple_query/clauses/group_having_clause.rb', line 21

def apply_to(query)
  @group_fields.each { |g| query.group(g) }
  if @having_conditions.any?
    combined = @having_conditions.inject { |c, a| c.and(a) }
    query.having(combined)
  end
  query
end