| Module | Sequel::Plugins::ClassTableInheritance::ClassMethods | 
| In: | lib/sequel/plugins/class_table_inheritance.rb | 
| cti_base_model | [R] | The parent/root/base model for this class table inheritance hierarchy. This is the only model in the hierarchy that load the class_table_inheritance plugin. | 
| cti_columns | [R] | Hash with table name symbol keys and arrays of column symbol values, giving the columns to update in each backing database table. | 
| cti_key | [R] | The column containing the class name as a string. Used to return instances of subclasses when calling the superclass‘s load method. | 
| cti_table_map | [R] | A hash with class name symbol keys and table name symbol values. Specified with the :table_map option to the plugin, and used if the implicit naming is incorrect. | 
| cti_tables | [R] | An array of table symbols that back this model. The first is cti_base_model table symbol, and the last is the current model table symbol. | 
Add the appropriate data structures to the subclass. Does not allow anonymous subclasses to be created, since they would not be mappable to a table.
     # File lib/sequel/plugins/class_table_inheritance.rb, line 118
118:         def inherited(subclass)
119:           cc = cti_columns
120:           ck = cti_key
121:           ct = cti_tables.dup
122:           ctm = cti_table_map.dup
123:           cbm = cti_base_model
124:           pk = primary_key
125:           ds = dataset
126:           subclass.instance_eval do
127:             raise(Error, "cannot create anonymous subclass for model class using class_table_inheritance") if !(n = name) || n.empty?
128:             table = ctm[n.to_sym] || implicit_table_name
129:             columns = db.from(table).columns
130:             @cti_key = ck 
131:             @cti_tables = ct + [table]
132:             @cti_columns = cc.merge(table=>columns)
133:             @cti_table_map = ctm
134:             @cti_base_model = cbm
135:             # Need to set dataset and columns before calling super so that
136:             # the main column accessor module is included in the class before any
137:             # plugin accessor modules (such as the lazy attributes accessor module).
138:             set_dataset(ds.join(table, [pk]))
139:             set_columns(self.columns)
140:           end
141:           super
142:           subclass.instance_eval do
143:             m = method(:constantize)
144:             dataset.row_proc = lambda{|r| (m.call(r[ck]) rescue subclass).load(r)}
145:             (columns - [cbm.primary_key]).each{|a| define_lazy_attribute_getter(a)}
146:             cti_tables.reverse.each do |table|
147:               db.schema(table).each{|k,v| db_schema[k] = v}
148:             end
149:           end
150:         end
          The primary key in the parent/base/root model, which should have a foreign key with the same name referencing it in each model subclass.
     # File lib/sequel/plugins/class_table_inheritance.rb, line 154
154:         def primary_key
155:           return super if self == cti_base_model
156:           cti_base_model.primary_key
157:         end