Class: DatabaseCore::V2::Query

Inherits:
Object
  • Object
show all
Defined in:
lib/database-core/v2/query.rb

Class Method Summary collapse

Class Method Details

.build(table, query) ⇒ Object 



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# File 'lib/database-core/v2/query.rb', line 5

def self.build table, query

  output = []

  build_select output, query

  output << "FROM `#{table}`"

  build_where output, query
  build_order output, query
  build_limit output, query
  build_offset output, query

  output.join " "
end

.build_keys(output, query) ⇒ Object 



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# File 'lib/database-core/v2/query.rb', line 88

def self.build_keys output, query

  unless query["has_one_key"].nil?
    unless output.include? "id"
      output << "id"
    end
  end

  unless query["has_many"].nil?
    unless output.include? "id"
      output << "id"
    end
  end

  unless query["has_many_key"].nil?
    unless output.include? query["has_many_key"]
      output << query["has_many_key"]
    end
  end

  unless query["has_one"].nil?
    query["has_one"].each do |table, query|
      unless query["has_one_key"].nil?
        unless output.include? query["has_one_key"]
          output << query["has_one_key"]
        end
      end
    end
  end
end

.build_limit(output, query) ⇒ Object 



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# File 'lib/database-core/v2/query.rb', line 74

def self.build_limit output, query

  unless query["limit"].nil?
    output << "LIMIT #{query["limit"]}"
  end
end

.build_offset(output, query) ⇒ Object 



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# File 'lib/database-core/v2/query.rb', line 81

def self.build_offset output, query

  unless query["offset"].nil?
    output << "OFFSET #{query["offset"]}"
  end
end

.build_order(output, query) ⇒ Object 



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# File 'lib/database-core/v2/query.rb', line 58

def self.build_order output, query

  order = []

  unless query["order"].nil?
    query["order"].each do |key, value|
      order << "`#{key}` #{value}"
    end
  end

  unless order.empty?
    order = order.join ","
    output << "ORDER BY #{order}"
  end
end

.build_select(output, query) ⇒ Object 



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# File 'lib/database-core/v2/query.rb', line 21

def self.build_select output, query

  columns = []

  build_keys columns, query

  unless query["columns"].nil?
    columns.concat query["columns"]
  end

  if columns.empty?
    output << "SELECT *"
  end

  unless columns.empty?
    columns.map!{ |column| "`#{column}`" }
    output << "SELECT #{columns.join ","}"
  end
end

.build_where(output, query) ⇒ Object 



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# File 'lib/database-core/v2/query.rb', line 41

def self.build_where output, query

  where_rules = []

  unless query["where_and"].nil?
    where_rules << Wherer.build(query["where_and"]).join(" AND ")
  end

  unless query["where_or"].nil?
    where_rules << Wherer.build(query["where_and"]).join(" OR ")
  end

  unless where_rules.empty?
    output << "WHERE #{where_rules.join(" AND ")}"
  end
end