Module: ModelsReflectionsHelper

Included in:
HousingMisc::ModelReflectionsController
Defined in:
lib/housing_misc/models_reflections_helper.rb

Constant Summary collapse

VAL_HASH_KEYS = 
["macros", "throughs", "foreign_keys", "primary_keys", "polymorphic", "as", "type", "join_table", "association_foreign_key"]

Instance Method Summary collapse

Instance Method Details

#convert_rows_to_col(array_of_rows) ⇒ Object 



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# File 'lib/housing_misc/models_reflections_helper.rb', line 76

def convert_rows_to_col(array_of_rows)
  column = array_of_rows.map{|row| row[0]}
  return column
end

#get_join_table_name(table1_name, table2_name) ⇒ Object 



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# File 'lib/housing_misc/models_reflections_helper.rb', line 98

def get_join_table_name(table1_name, table2_name)
  table_name = ""
  table1_name.length.times do |i|
    next if table1_name[i]==table2_name[i] && table1_name[i] != "_"
    if table1_name[i]==table2_name[i] && table1_name[i] == "_"
      table_name = table1_name[0,i+1] + (table1_name[i+1, table1_name.length]<table2_name[i+1, table2_name.length] ? (table1_name[i+1, table1_name.length] + "_" + table2_name[i+1, table2_name.length]) : (table2_name[i+1, table2_name.length] + "_" + table1_name[i+1, table1_name.length]))
    else 
      table_name = table1_name<table2_name ? (table1_name + "_" + table2_name) : (table2_name + "_" + table1_name)
    end
    break
  end
  return table_name
end

#get_model_reflections(model) ⇒ Object 



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# File 'lib/housing_misc/models_reflections_helper.rb', line 15

def get_model_reflections(model)
  val_hash = {}
  model_reflections = {}
  reflections = model.constantize.reflections
  model_table_name = model.constantize.table_name
  reflections.keys.each do |reflection|
    next if reflections[reflection].options[:polymorphic]
    #   models_foreign_type = reflections[reflection].foreign_type
    #   sql = "SELECT DISTINCT #{models_foreign_type} FROM #{model.constantize.table_name}"
    #   rows_of_model = ActiveRecord::Base.connection.exec_query(sql).rows
    #   model_names = convert_rows_to_col(rows_of_model)
    #   val_hash["table_name"] = "#{reflection}_polymorphic"
    #   val_hash["table_names"], val_hash["primary_keys"], val_hash["model_names"] = get_table_names_primary_keys_and_model_names(model_names, model)
    #   val_hash["polymorphic"] = ["TRUE"]
    #   val_hash["foreign_type"] = [models_foreign_type]   
    # else
    model_name = reflections[reflection].class_name.constantize rescue ("#{model}::#{reflections[reflection].class_name}".constantize rescue "")
    table_name = model_name.table_name rescue ""
    next if table_name.blank?
    val_hash["table_name"] = table_name
    val_hash["throughs"] = [reflections[reflection].options[:through] || "FALSE"]
    val_hash["polymorphic"] = ["FALSE"]
    val_hash["as"] = [reflections[reflection].options[:as] || "FALSE"]
    val_hash["type"] = [reflections[reflection].type || "FALSE"] 
    val_hash["join_table"] = reflections[reflection].macro == :has_and_belongs_to_many ? [reflections[reflection].options[:join_table] || get_join_table_name(model_table_name, table_name)] : ["FALSE"]
    val_hash["association_foreign_key"] = reflections[reflection].macro == :has_and_belongs_to_many ? [reflections[reflection].options[:association_foreign_key] || reflections[reflection].association_foreign_key] : ["FALSE"]  
    val_hash["primary_keys"] = [reflections[reflection].options[:primary_key] || get_primary_key(reflections[reflection].macro, model_name, model)] 
    val_hash["model_name"] = model_name.to_s
    update_base_models(val_hash["model_name"], model)
    #end
    val_hash["macros"] = [reflections[reflection].macro] 
    val_hash["foreign_keys"] = [reflections[reflection].foreign_key]
    if model_reflections.key?(val_hash["table_name"])
      VAL_HASH_KEYS.each do |val_hash_key|
        model_reflections[val_hash["table_name"]][val_hash_key].concat(val_hash[val_hash_key])
      end
    else
      model_reflections[val_hash["table_name"]] = val_hash
    end
    val_hash = {} 
  end
  model_reflections["primary_key"] = model.constantize.primary_key
  model_reflections["model"] = model
  return model_table_name, model_reflections
end

#get_primary_key(macro, reflection_model_name, model_name) ⇒ Object 



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# File 'lib/housing_misc/models_reflections_helper.rb', line 81

def get_primary_key(macro, reflection_model_name, model_name)
  primary_key = ""
  case macro
  when :belongs_to, :has_and_belongs_to_many
    primary_key = reflection_model_name.primary_key
  when :has_one, :has_many
    primary_key = model_name.constantize.primary_key
  end
  return primary_key
end

#get_table_names_primary_keys_and_model_names(model_names, model) ⇒ Object 



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# File 'lib/housing_misc/models_reflections_helper.rb', line 61

def get_table_names_primary_keys_and_model_names(model_names, model)
  table_names = []
  primary_keys = []
  table_models = []
  model_names.each do |model_name|
    table_name = model_name.constantize.table_name rescue ("#{model}::#{model_name}".constantize.table_name rescue "")
    next if table_name.blank?
    table_names.push(table_name)
    table_models.push(model_name)
    primary_keys.push(model_name.constantize.primary_key)
    update_base_models(model_name, model)
  end
  return table_names, primary_keys, table_models
end

#tables_reflections_hash_generator(base_models) ⇒ Object 



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# File 'lib/housing_misc/models_reflections_helper.rb', line 3

def tables_reflections_hash_generator(base_models)
  @base_models = base_models
  @tables_reflections_hash = {}
  loop do 
    break if @base_models.empty?
    model = @base_models.shift
    table, model_reflections = get_model_reflections(model) 
    @tables_reflections_hash.store(table, model_reflections)
  end
  return @tables_reflections_hash
end

#update_base_models(model_name, model) ⇒ Object 



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# File 'lib/housing_misc/models_reflections_helper.rb', line 92

def update_base_models(model_name, model)
  if !@tables_reflections_hash.key?(model_name.constantize.table_name) && (model_name != model) && !@base_models.include?(model_name)
    @base_models.push(model_name)
  end
end