Module: Sequel::Pervasive::DatasetMethods
- Defined in:
- lib/sequel/pervasive_adapter.rb
Constant Summary collapse
- SELECT_CLAUSE_METHODS =
Dataset.clause_methods(:select, %w'limit distinct columns from with join where group order having compounds')
Instance Method Summary collapse
- #convert_odbc_value(v, column_type = nil) ⇒ Object
- #fetch_rows(sql, &block) ⇒ Object
- #get_column_type(column_name) ⇒ Object
- #quoted_identifier(name, convert = true) ⇒ Object
-
#select_fields(hash) ⇒ Object
Take a table name and write out the field names for that table in this style: “‘DUDES`.`KID - DATE`”.lit where the table name is :dudes, and fields are [:kid_date].
Instance Method Details
#convert_odbc_value(v, column_type = nil) ⇒ Object
82 83 84 85 86 87 88 89 90 91 92 |
# File 'lib/sequel/pervasive_adapter.rb', line 82 def convert_odbc_value(v, column_type=nil) case column_type when :date then Date.from_fos_days(v.to_i) when :time then Date.from_fos_days(0).to_time.utc + v.to_i.minutes else v = v.unpack('A*')[0] if v.is_a? String super(v) end end |
#fetch_rows(sql, &block) ⇒ Object
64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 |
# File 'lib/sequel/pervasive_adapter.rb', line 64 def fetch_rows(sql, &block) execute(sql) do |s| i = -1 cols = s.columns(true).map{|c| [output_identifier(c.name), i+=1]} @columns = cols.map{|c| c.at(0)} if rows = s.fetch_all rows.each do |row| hash = {} cols.each{|n, i| hash[n] = convert_odbc_value(row[i], get_column_type(@columns[i]))} yield hash end end end self end |
#get_column_type(column_name) ⇒ Object
94 95 96 97 98 99 |
# File 'lib/sequel/pervasive_adapter.rb', line 94 def get_column_type(column_name) if model and model.respond_to?(:datatypes) and model.datatypes and model.datatypes[column_name] return model.datatypes[column_name][:type] end nil end |
#quoted_identifier(name, convert = true) ⇒ Object
103 104 105 |
# File 'lib/sequel/pervasive_adapter.rb', line 103 def quoted_identifier(name, convert=true) convert ? "\"#{convert_aliased_col_to_real_col(name)}\"" : "\"#{name}\"" end |
#select_fields(hash) ⇒ Object
Take a table name and write out the field names for that table in this style: “‘DUDES`.`KID - DATE`”.lit where the table name is :dudes, and fields are [:kid_date]
110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 |
# File 'lib/sequel/pervasive_adapter.rb', line 110 def select_fields(hash) new_hash = Hash.new{|k, v| k[v]= {}} hash.each do |association, fields| new_hash[association][:fields] = fields if association == :self new_hash[association][:model] = self.model new_hash[association][:association_name] = self.model.table_name elsif association.to_s.match /(\w+)__(\w+)/ # crew_legs__position_code # not an assocation on the current model .. but another one new_hash[association][:association_name] = $2.to_s.upcase new_hash[association][:model] = model.association_reflection($1.to_sym)[:class].association_reflection($2.to_sym)[:class] else raise(Sequel::Error, "Invalid #{model} association: #{association}") unless model.association_reflection(association) new_hash[association][:association_name] = association.to_s.upcase new_hash[association][:model] = model.association_reflection(association)[:class] end fields = fields + new_hash[association][:model].primary_key unless fields[0] == :* new_hash[association][:fields] = fields end s = [] new_hash.each do |association, hash| if hash[:fields].size == 1 and hash[:fields][0] == :* s << "#{quoted_identifier(hash[:association_name], false)}.*".lit else s << hash[:fields].collect do |field| raw_field_name = convert_aliased_col_to_real_col_with_model(field, hash[:model]) as_alias = '' raw_field_name if association != :self and ( hash[:model].primary_key.include? field or field_duplicate(new_hash, association, field) ) as_field_name = "#{hash[:association_name]}_#{raw_field_name}" as_alias = "AS #{quoted_identifier(as_field_name, false)}" end "#{quoted_identifier(hash[:association_name], false)}.#{quoted_identifier(raw_field_name, false)} #{as_alias}".lit end end end clone(:select => s.flatten) end |