Building a recursive function to access values in nested hash in ruby - ruby

Question

Is there a more ruby way to achieve this dynamically, perhaps recursively. Currently I have player's table with some attributes that I care about like SURNAME, GIVEN_NAME, AT_BATS, RUNS, HITS, HOME_RUNS, RBI, etc. How can I access the player's hash values and load it into my database dynamically? Currently I have the following which works, however I'm fetching the teams manually and iterating over the "all_players" array. There's got to be a simpler rubyish way. Please note I skipped the closing brackets in the Json example below for example purposes.
seeds.rb
file = File.read("#{Rails.root}/db/1998_stats.json")
data_hash = JSON.parse(file).with_indifferent_access
#####################ALL TEAMS ###################################
braves = data_hash['SEASON']['LEAGUE'][0]['DIVISION'][0]['TEAM'][0]['PLAYER']
marlins = data_hash['SEASON']['LEAGUE'][0]['DIVISION'][0]['TEAM'][1]['PLAYER']
expos = data_hash['SEASON']['LEAGUE'][0]['DIVISION'][0]['TEAM'][2]['PLAYER']
mets = data_hash['SEASON']['LEAGUE'][0]['DIVISION'][0]['TEAM'][3]['PLAYER']
phillies = data_hash['SEASON']['LEAGUE'][0]['DIVISION'][0]['TEAM'][4]['PLAYER']
cubs = data_hash['SEASON']['LEAGUE'][0]['DIVISION'][1]['TEAM'][0]['PLAYER']
reds = data_hash['SEASON']['LEAGUE'][0]['DIVISION'][1]['TEAM'][1]['PLAYER']
astros = data_hash['SEASON']['LEAGUE'][0]['DIVISION'][1]['TEAM'][2]['PLAYER']
brewers = data_hash['SEASON']['LEAGUE'][0]['DIVISION'][1]['TEAM'][3]['PLAYER']
pirates = data_hash['SEASON']['LEAGUE'][0]['DIVISION'][1]['TEAM'][4]['PLAYER']
cardinals = data_hash['SEASON']['LEAGUE'][0]['DIVISION'][1]['TEAM'][5]['PLAYER']
diamondbacks = data_hash['SEASON']['LEAGUE'][0]['DIVISION'][2]['TEAM'][0]['PLAYER']
rockies = data_hash['SEASON']['LEAGUE'][0]['DIVISION'][2]['TEAM'][1]['PLAYER']
dodgers = data_hash['SEASON']['LEAGUE'][0]['DIVISION'][2]['TEAM'][2]['PLAYER']
padres = data_hash['SEASON']['LEAGUE'][0]['DIVISION'][2]['TEAM'][3]['PLAYER']
giants = data_hash['SEASON']['LEAGUE'][0]['DIVISION'][2]['TEAM'][4]['PLAYER']
orioles = data_hash['SEASON']['LEAGUE'][1]['DIVISION'][0]['TEAM'][0]['PLAYER']
redsox = data_hash['SEASON']['LEAGUE'][1]['DIVISION'][0]['TEAM'][1]['PLAYER']
yankees = data_hash['SEASON']['LEAGUE'][1]['DIVISION'][0]['TEAM'][2]['PLAYER']
devil_rays = data_hash['SEASON']['LEAGUE'][1]['DIVISION'][0]['TEAM'][3]['PLAYER']
blue_jays = data_hash['SEASON']['LEAGUE'][1]['DIVISION'][0]['TEAM'][4]['PLAYER']
whitesox = data_hash['SEASON']['LEAGUE'][1]['DIVISION'][1]['TEAM'][0]['PLAYER']
royals = data_hash['SEASON']['LEAGUE'][1]['DIVISION'][1]['TEAM'][1]['PLAYER']
tigers = data_hash['SEASON']['LEAGUE'][1]['DIVISION'][1]['TEAM'][2]['PLAYER']
indians = data_hash['SEASON']['LEAGUE'][1]['DIVISION'][1]['TEAM'][3]['PLAYER']
twins = data_hash['SEASON']['LEAGUE'][1]['DIVISION'][1]['TEAM'][4]['PLAYER']
angels = data_hash['SEASON']['LEAGUE'][1]['DIVISION'][2]['TEAM'][0]['PLAYER']
athletics = data_hash['SEASON']['LEAGUE'][1]['DIVISION'][2]['TEAM'][1]['PLAYER']
mariners = data_hash['SEASON']['LEAGUE'][1]['DIVISION'][2]['TEAM'][2]['PLAYER']
rangers = data_hash['SEASON']['LEAGUE'][1]['DIVISION'][2]['TEAM'][3]['PLAYER']
all_players = [braves, marlins, expos, mets, phillies, cubs, reds, astros, brewers, pirates, cardinals,
diamondbacks, rockies, dodgers, padres, giants, orioles, redsox, yankees, devil_rays, blue_jays,
whitesox, royals, tigers, indians, twins, angels, athletics, mariners, rangers]
all_players.each do |players_per_team|
players_per_team.each do |player|
Player.create! do |new_player|
new_player.first = player['GIVEN_NAME']
new_player.last = player['SURNAME']
new_player.position = player['POSITION']
new_player.hits = player['HITS']
new_player.bats = player['AT_BATS']
new_player.doubles = player['DOUBLES']
new_player.triples = player['TRIPLES']
new_player.walks = player['WALKS']
new_player.hbp = player['HIT_BY_PITCH']
new_player.sh = player['SACRIFICE_HITS']
new_player.sf = player['SACRIFICE_FLIES']
new_player.avg = nil
new_player.hr = player['HOME_RUNS']
new_player.rbi = player['RBI']
new_player.sb = player['STEALS']
new_player.ops = player['']
new_player.runs = player['']
new_player.obp = player['']
end
end
end
Json
{
"SEASON": {
"YEAR": "1998",
"LEAGUE": [
{
"LEAGUE_NAME": "National League",
"DIVISION": [
{
"DIVISION_NAME": "East",
"TEAM": [
{
"TEAM_CITY": "Atlanta",
"TEAM_NAME": "Braves",
"PLAYER": [
{
"SURNAME": "Malloy",
"GIVEN_NAME": "Marty",
"POSITION": "Second Base",
"GAMES": "11",
"GAMES_STARTED": "8",
"AT_BATS": "28",
"RUNS": "3",
"HITS": "5",
"DOUBLES": "1",
"TRIPLES": "0",
"HOME_RUNS": "1",
"RBI": "1",
"STEALS": "0",
"CAUGHT_STEALING": "0",
"SACRIFICE_HITS": "0",
"SACRIFICE_FLIES": "0",
"ERRORS": "0",
"PB": "0",
"WALKS": "2",
"STRUCK_OUT": "2",
"HIT_BY_PITCH": "0"
},
...

Answer 1

Recursion is not needed here.
# data_hash['SEASON']['LEAGUE'][1]['DIVISION'][0]['TEAM'][0]['PLAYER']
players = (0..1).map do |league|
(0..3).map do |division|
(0..40).map do |team|
data_hash['SEASON']['LEAGUE'][league]['DIVISION'][division]['TEAM'][team]['PLAYER']
end
end
end.flatten
The code is untested, but it should work.