Class: Riddle::Query::Select

Inherits:
Object
  • Object
show all
Defined in:
lib/riddle/query/select.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Select

Returns a new instance of Select.



2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
 
# File 'lib/riddle/query/select.rb', line 2

def initialize
  @values                = ['*']
  @indices               = []
  @matching              = nil
  @wheres                = {}
  @where_alls            = {}
  @where_nots            = {}
  @where_not_alls        = {}
  @group_by              = nil
  @order_by              = nil
  @order_within_group_by = nil
  @offset                = nil
  @limit                 = nil
  @options               = {}
end

Instance Method Details

#from(*indices) ⇒ Object 



23
24
25
26
 
# File 'lib/riddle/query/select.rb', line 23

def from(*indices)
  @indices += indices
  self
end

#group_by(attribute) ⇒ Object 



53
54
55
56
 
# File 'lib/riddle/query/select.rb', line 53

def group_by(attribute)
  @group_by = attribute
  self
end

#limit(limit) ⇒ Object 



68
69
70
71
 
# File 'lib/riddle/query/select.rb', line 68

def limit(limit)
  @limit = limit
  self
end

#matching(match) ⇒ Object 



28
29
30
31
 
# File 'lib/riddle/query/select.rb', line 28

def matching(match)
  @matching = match
  self
end

#offset(offset) ⇒ Object 



73
74
75
76
 
# File 'lib/riddle/query/select.rb', line 73

def offset(offset)
  @offset = offset
  self
end

#order_by(order) ⇒ Object 



58
59
60
61
 
# File 'lib/riddle/query/select.rb', line 58

def order_by(order)
  @order_by = order
  self
end

#order_within_group_by(order) ⇒ Object 



63
64
65
66
 
# File 'lib/riddle/query/select.rb', line 63

def order_within_group_by(order)
  @order_within_group_by = order
  self
end

#to_sql ⇒ Object 



83
84
85
86
87
88
89
90
91
92
93
94
95
 
# File 'lib/riddle/query/select.rb', line 83

def to_sql
  sql = "SELECT #{ @values.join(', ') } FROM #{ @indices.join(', ') }"
  sql << " WHERE #{ combined_wheres }" if wheres?
  sql << " GROUP BY #{escape_column(@group_by)}"      if !@group_by.nil?
  unless @order_within_group_by.nil?
    sql << " WITHIN GROUP ORDER BY #{escape_column(@order_within_group_by)}"
  end
  sql << " ORDER BY #{escape_column(@order_by)}"      if !@order_by.nil?
  sql << " #{limit_clause}"   unless @limit.nil? && @offset.nil?
  sql << " #{options_clause}" unless @options.empty?

  sql
end

#values(*values) ⇒ Object 



18
19
20
21
 
# File 'lib/riddle/query/select.rb', line 18

def values(*values)
  @values += values
  self
end

#where(filters = {}) ⇒ Object 



33
34
35
36
 
# File 'lib/riddle/query/select.rb', line 33

def where(filters = {})
  @wheres.merge!(filters)
  self
end

#where_all(filters = {}) ⇒ Object 



38
39
40
41
 
# File 'lib/riddle/query/select.rb', line 38

def where_all(filters = {})
  @where_alls.merge!(filters)
  self
end

#where_not(filters = {}) ⇒ Object 



43
44
45
46
 
# File 'lib/riddle/query/select.rb', line 43

def where_not(filters = {})
  @where_nots.merge!(filters)
  self
end

#where_not_all(filters = {}) ⇒ Object 



48
49
50
51
 
# File 'lib/riddle/query/select.rb', line 48

def where_not_all(filters = {})
  @where_not_alls.merge!(filters)
  self
end

#with_options(options = {}) ⇒ Object 



78
79
80
81
 
# File 'lib/riddle/query/select.rb', line 78

def with_options(options = {})
  @options.merge! options
  self
end