Class: SlimScrooge::ResultSet

Inherits:
Object
  • Object
show all
Defined in:
lib/slim_scrooge/result_set.rb

Overview

A ResultSet contains all the rows found by an sql query A call to reload! will cause all the rows in the set to be fully loaded from the database - this should be called when a column access that hasn’t previously been seen by SlimScrooge is encountered

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(rows, callsite_key, fetched_columns) ⇒ ResultSet

Returns a new instance of ResultSet.



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# File 'lib/slim_scrooge/result_set.rb', line 12

def initialize(rows, callsite_key, fetched_columns)
  @rows = rows
  @callsite_key = callsite_key
  @fetched_columns = fetched_columns
end

Instance Attribute Details

#callsite_key ⇒ Object (readonly)

Returns the value of attribute callsite_key.



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# File 'lib/slim_scrooge/result_set.rb', line 10

def callsite_key
  @callsite_key
end

#rows ⇒ Object (readonly)

Returns the value of attribute rows.



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# File 'lib/slim_scrooge/result_set.rb', line 10

def rows
  @rows
end

Instance Method Details

#reload! ⇒ Object

Reload all the rows in the sql result at once Reloads only those columns we didn’t fetch the first time



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# File 'lib/slim_scrooge/result_set.rb', line 25

def reload!
  callsite = Callsites[@callsite_key]
  rows_hash = rows_by_key(callsite.primary_key)
  sql = callsite.reload_sql(rows_hash.keys, @fetched_columns)
  new_rows = callsite.connection.send(:select, sql, "#{callsite.model_class_name} Reload SlimScrooged")
  new_rows.each do |row|
    if old_row = rows_hash[row[callsite.primary_key]]
      old_row.result_set = nil
      old_row.monitored_columns.merge!(row)
    end
  end
end

#rows_by_key(key) ⇒ Object 



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# File 'lib/slim_scrooge/result_set.rb', line 18

def rows_by_key(key)
  @rows.inject({}) {|hash, row| hash[row[key]] = row; hash}
end