Class: Cartomodel::QueryGenerator

Inherits:
Object
  • Object
show all
Defined in:
lib/cartomodel/query_generator.rb

Instance Method Summary collapse

Constructor Details

#initialize(table_name) ⇒ QueryGenerator

Returns a new instance of QueryGenerator.



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# File 'lib/cartomodel/query_generator.rb', line 3

def initialize(table_name)
  @table_name = table_name
  @table = Arel::Table.new(@table_name)
end

Instance Method Details

#delete(id_column, id_value) ⇒ Object 



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# File 'lib/cartomodel/query_generator.rb', line 35

def delete(id_column, id_value)
  manager = Arel::DeleteManager.new
  manager.from @table

  manager.where @table[id_column].eq(id_value)

  return manager.to_sql
end

#insert(raw_values) ⇒ Object 



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# File 'lib/cartomodel/query_generator.rb', line 8

def insert(raw_values)
  manager = Arel::InsertManager.new()
  manager.into @table
  values = []

  raw_values.each do |key, value|
    values << [@table[key], value]
  end

  manager.insert(values)
  manager.to_sql + ' RETURNING cartodb_id'
end

#update(raw_values, id_column, id_value) ⇒ Object 



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# File 'lib/cartomodel/query_generator.rb', line 21

def update(raw_values, id_column, id_value)
  values = []

  raw_values.each do |key, value|
    values << [@table[key], value]
  end

  manager = Arel::UpdateManager.new
  manager.table @table
  manager.where @table[id_column].eq(id_value)
  manager.set values
  return manager.to_sql
end