Class: Sequel::Postgres::Dataset

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

Overview

Add faster versions of Dataset#map, #as_hash, #to_hash_groups, #select_map, #select_order_map, and #select_hash

Instance Method Summary collapse

Instance Method Details

#as_hash(key_column, value_column = nil, opts = Sequel::OPTS) ⇒ Object Also known as: to_hash

In the case where both arguments given, use an optimized version.



45
46
47
48
49
50
51
52
53
 
# File 'lib/sequel_pg/sequel_pg.rb', line 45

def as_hash(key_column, value_column = nil, opts = Sequel::OPTS)
  if value_column && !opts[:hash]
    clone(:_sequel_pg_type=>:hash, :_sequel_pg_value=>[key_column, value_column]).fetch_rows(sql){|s| return s}
  elsif opts.empty?
    super(key_column, value_column)
  else
    super
  end
end

#each ⇒ Object

If model loads are being optimized and this is a model load, use the optimized version.



75
76
77
78
79
80
81
 
# File 'lib/sequel_pg/sequel_pg.rb', line 75

def each
  if optimize_model_load?
    clone(:_sequel_pg_type=>:model, :_sequel_pg_value=>row_proc).fetch_rows(sql, &Proc.new)
  else
    super
  end
end

#map(sym = nil) ⇒ Object

In the case where an argument is given, use an optimized version.



25
26
27
28
29
30
31
32
33
34
35
36
37
 
# File 'lib/sequel_pg/sequel_pg.rb', line 25

def map(sym=nil)
  if sym
    if block_given?
      super
    else
      rows = []
      clone(:_sequel_pg_type=>:map, :_sequel_pg_value=>sym).fetch_rows(sql){|s| rows << s}
      rows
    end
  else
    super
  end
end

#optimize_model_load ⇒ Object 



19
20
21
22
 
# File 'lib/sequel_pg/sequel_pg.rb', line 19

def optimize_model_load
  Sequel::Deprecation.deprecate("Dataset#optimize_model_load method is deprecated.  Optimized model loading is enabled by default.")
  opts.has_key?(:optimize_model_load) ?  opts[:optimize_model_load] : true
end

#optimize_model_load=(v) ⇒ Object 



15
16
17
18
 
# File 'lib/sequel_pg/sequel_pg.rb', line 15

def optimize_model_load=(v)
  Sequel::Deprecation.deprecate("Dataset#optimize_model_load= mutation method is deprecated.  Switch to using Dataset#with_optimize_model_load, which returns a modified dataset")
  opts[:optimize_model_load] = v
end

#to_hash_groups(key_column, value_column = nil, opts = Sequel::OPTS) ⇒ Object

In the case where both arguments given, use an optimized version.



62
63
64
65
66
67
68
69
70
 
# File 'lib/sequel_pg/sequel_pg.rb', line 62

def to_hash_groups(key_column, value_column = nil, opts = Sequel::OPTS)
  if value_column && !opts[:hash]
    clone(:_sequel_pg_type=>:hash_groups, :_sequel_pg_value=>[key_column, value_column]).fetch_rows(sql){|s| return s}
  elsif opts.empty?
    super(key_column, value_column)
  else
    super
  end
end

#with_optimize_model_load(v) ⇒ Object

Return a modified copy with the optimize_model_load setting changed.



40
41
42
 
# File 'lib/sequel_pg/sequel_pg.rb', line 40

def with_optimize_model_load(v)
  clone(:optimize_model_load=>v)
end