Class: GrnMini::Table

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/grn_mini/table.rb

Direct Known Subclasses

Array, Hash

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, grn) ⇒ Table

Returns a new instance of Table.



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# File 'lib/grn_mini/table.rb', line 11

def initialize(name, grn)
  @name = name
  @grn  = grn
  @terms = Groonga["Terms"] || Groonga::PatriciaTrie.create(name: "Terms", key_normalize: true, default_tokenizer: GrnMini::default_tokenizer)
  @setup_columns_once = false
end

Instance Attribute Details

#grn ⇒ Object

Returns the value of attribute grn.



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# File 'lib/grn_mini/table.rb', line 8

def grn
  @grn
end

Instance Method Details

#each ⇒ Object 



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# File 'lib/grn_mini/table.rb', line 102

def each
  @grn.each do |record|
    yield record
  end
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/grn_mini/table.rb', line 98

def empty?
  size == 0
end

#group(key, options = {}) ⇒ Object 



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# File 'lib/grn_mini/table.rb', line 112

def group(key, options = {})
  @grn.group(key, options)
end

#need_setup_columns? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/grn_mini/table.rb', line 18

def need_setup_columns?
  !@setup_columns_once && empty?
end

#select(*args, &block) ⇒ Object 



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# File 'lib/grn_mini/table.rb', line 90

def select(*args, &block)
  @grn.select(*args, &block)
end

#setup_columns(hash) ⇒ Object 



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# File 'lib/grn_mini/table.rb', line 22

def setup_columns(hash)
  Groonga::Schema.define do |schema|
    schema.change_table(@name) do |table|
      hash.each do |key, value|
        column = key.to_s

        if value.is_a?(::Array)
          table.column(column, value_type(value), type: :vector)
        else
          table.column(column, value_type(value))
        end
      end
    end

    schema.change_table("Terms") do |table|
      hash.each do |key, value|
        column = key.to_s

        if value.is_a?(String)
          table.index("#{@name}.#{column}", with_position: true)
        end
      end
    end

    hash.each do |key, value|
      column = key.to_s
      
      if value.is_a?(::Array)
        elem = value.first
        
        if elem.is_a?(GrnMini::Table)
          schema.change_table(elem.grn.name) do |table|
            table.index("#{@grn.name}.#{column}")
          end
        elsif elem.is_a?(Groonga::Table)
          schema.change_table(elem.name) do |table|
            table.index("#{@grn.name}.#{column}")
          end
        end
      end
    end
  end

  @setup_columns_once = true
end

#size ⇒ Object 



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# File 'lib/grn_mini/table.rb', line 94

def size
  @grn.size
end

#sort(keys, options = {}) ⇒ Object 



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# File 'lib/grn_mini/table.rb', line 108

def sort(keys, options = {})
  @grn.sort(keys, options)
end

#value_type(value) ⇒ Object 



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# File 'lib/grn_mini/table.rb', line 68

def value_type(value)
  if value.is_a?(TrueClass) || value.is_a?(FalseClass)
    "Bool"
  elsif value.is_a?(Integer)
    "Int32"
  elsif value.is_a?(Float)
    "Float"
  elsif value.is_a?(Time)
    "Time"
  elsif value.is_a?(String)
    "ShortText"
  elsif value.is_a?(GrnMini::Table)
    value.grn.name
  elsif value.is_a?(Groonga::Table)
    value.name
  elsif value.is_a?(::Array)
    value_type(value.first)
  else
    raise NotSupportColumnType, value
  end
end