Class: DatabaseCore::V3::QueryRunner

Inherits:
Object
  • Object
show all
Defined in:
lib/database-core/v3/query_runner.rb

Class Method Summary collapse

Class Method Details

.query(models_query) ⇒ Object 



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# File 'lib/database-core/v3/query_runner.rb', line 5

def self.query models_query

  models_values = setup_query(models_query)

  remove_keys(models_query, models_values)

  models_values = setup_values(models_values)

  models_values
end

.remove_key(query, value) ⇒ Object 



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# File 'lib/database-core/v3/query_runner.rb', line 143

def self.remove_key query, value

  columns = query["columns"]&.map{ |column| column.is_a?(Hash) ? column["alias"] : column }

  value.keys.each do |key|

    next if columns.include?(key)

    next if query["parents"]&.key?(key)
    next if query["children"]&.key?(key)

    value.delete(key)
  end

  remove_keys query["parents"], value
  remove_keys query["children"], value
end

.remove_keys(models_query, models_values) ⇒ Object 



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# File 'lib/database-core/v3/query_runner.rb', line 126

def self.remove_keys models_query, models_values

  models_query&.each do |model, query|

    if models_values[model].is_a?(Array)
      models_values[model].each do |value|
        remove_key query, value
      end
    end

    if models_values[model].is_a?(Hash)
      value = models_values[model]
      remove_key query, value
    end
  end
end

.setup_query(models_query) ⇒ Object 



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# File 'lib/database-core/v3/query_runner.rb', line 16

def self.setup_query models_query

  models_values = { "rows" => {} }

  models_query.each do |model, query|

    QueryModel.build_parents(model, query)
    QueryModel.build_children(model, query)

    sql = QueryModel.build(model, query)

    values = ActiveRecord::Base.connection.exec_query(sql).map(&:as_json)

    if query["rows"]

      sql = QueryModel.build_count(model, query)

      rows = ActiveRecord::Base.connection.exec_query(sql).first.as_json

      models_values["rows"].merge!(rows)
    end

    if values.present?

      setup_relation values, query["parents"], true
      setup_relation values, query["children"], false
    end

    models_values[model] = values
  end

  models_values
end

.setup_relation(parents, models_query, relation) ⇒ Object 



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# File 'lib/database-core/v3/query_runner.rb', line 50

def self.setup_relation parents, models_query, relation

  return unless models_query.present?

  setup_relation_query(parents, models_query, relation)
  setup_relation_value(parents, models_query, relation)
end

.setup_relation_query(parents, models_query, relation) ⇒ Object 



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# File 'lib/database-core/v3/query_runner.rb', line 58

def self.setup_relation_query parents, models_query, relation

  models_query.each do |model, query|

    next if query["key"].nil?

    foreign_key = relation ? "id" : query["key"]
    primary_key = relation ? query["key"] : "id"

    keys = parents.map{ |parent| parent[primary_key] }.uniq.compact

    next if keys.empty?

    query["and"] = {} if query["and"].nil?

    if query["and"][foreign_key]
      query["and"][foreign_key]["in"] ?
        query["and"][foreign_key]["in"] << keys :
        query["and"][foreign_key]["in"] = keys
    else
      query["and"][foreign_key] = { "in" => keys }
    end
  end
end

.setup_relation_value(parents, models_query, relation) ⇒ Object 



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# File 'lib/database-core/v3/query_runner.rb', line 83

def self.setup_relation_value parents, models_query, relation

  models_values = setup_query(models_query)

  parents.each do |parent|

    models_query.each do |model, query|

      next if query["key"].nil?

      foreign_key = relation ? "id" : query["key"]
      primary_key = relation ? query["key"] : "id"

      values = models_values[model].select{ |value| value[foreign_key] == parent[primary_key] }

      parent[model] = relation ? values.first : values
    end
  end
end

.setup_values(target) ⇒ Object 



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# File 'lib/database-core/v3/query_runner.rb', line 103

def self.setup_values target

  if target.is_a?(Integer)
    return target > 2**32 ? target.to_s : target
  end

  if target.is_a?(Array)
    return target.map { |value| setup_values(value) }
  end

  if target.is_a?(Hash)
    return target.transform_values { |value| setup_values(value) }
  end

  if target.is_a?(String)
    unless [Encoding::US_ASCII, Encoding::UTF_8].include?(target.encoding)
      return target.bytes.to_a
    end
  end

  target
end