Class: M4DBI::Database

Inherits:
Object show all
Defined in:
lib/m4dbi/database.rb

Instance Method Summary collapse

Constructor Details

#initialize(rdbi_dbh) ⇒ Database

Returns a new instance of Database.



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# File 'lib/m4dbi/database.rb', line 5

def initialize( rdbi_dbh )
  @dbh = rdbi_dbh
end

Instance Method Details

#connected? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/m4dbi/database.rb', line 45

def connected?
  @dbh.connected?
end

#database_name ⇒ Object 



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# File 'lib/m4dbi/database.rb', line 57

def database_name
  @dbh.database_name
end

#disconnect ⇒ Object 



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# File 'lib/m4dbi/database.rb', line 49

def disconnect
  @dbh.disconnect
end

#driver ⇒ Object 



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# File 'lib/m4dbi/database.rb', line 69

def driver
  @dbh.driver
end

#execute(*args) ⇒ Object Also known as: update, u, insert, i, delete, d 



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# File 'lib/m4dbi/database.rb', line 13

def execute( *args )
  @dbh.execute *args
end

#last_query ⇒ Object 



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# File 'lib/m4dbi/database.rb', line 65

def last_query
  @dbh.last_query
end

#prepare(*args) ⇒ Object 



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# File 'lib/m4dbi/database.rb', line 9

def prepare( *args )
  Statement.new( @dbh.prepare(*args) )
end

#select(sql, *bindvars) ⇒ Object Also known as: select_all, s 



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# File 'lib/m4dbi/database.rb', line 17

def select( sql, *bindvars )
  execute( sql, *bindvars ).fetch( :all, RDBI::Result::Driver::Struct )
end

#select_column(sql, *bindvars) ⇒ Object Also known as: sc 



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# File 'lib/m4dbi/database.rb', line 25

def select_column( sql, *bindvars )
  rows = execute( sql, *bindvars ).fetch( 1, RDBI::Result::Driver::Array )
  if rows.any?
    rows[ 0 ][ 0 ]
  else
    raise RDBI::Error.new( "Query returned no rows.  SQL: #{@dbh.last_query}" )
  end
end

#select_one(sql, *bindvars) ⇒ Object Also known as: s1 



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# File 'lib/m4dbi/database.rb', line 21

def select_one( sql, *bindvars )
  select( sql, *bindvars )[ 0 ]
end

#table_schema(*args) ⇒ Object 



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# File 'lib/m4dbi/database.rb', line 53

def table_schema( *args )
  @dbh.table_schema( *args )
end

#transaction(&block) ⇒ Object 



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# File 'lib/m4dbi/database.rb', line 61

def transaction( &block )
  @dbh.transaction &block
end