Module: RedisModelExtension::SaveDestroy

Defined in:
lib/redis-model-extension/save_destroy.rb

Instance Method Summary collapse

Instance Method Details

#create_aliases ⇒ Object

create aliases (create key value [STRING] key is alias redis key and value is redis key)



66
67
68
69
70
71
 
# File 'lib/redis-model-extension/save_destroy.rb', line 66

def create_aliases
  main_key = redis_key
  redis_alias_config.each do |alias_name, fields|
    RedisModelExtension::Database.redis.sadd(redis_alias_key(alias_name), main_key) if valid_alias_key? alias_name
  end
end

#destroy! ⇒ Object Also known as: destroy

remove record form database



84
85
86
87
88
89
90
91
92
 
# File 'lib/redis-model-extension/save_destroy.rb', line 84

def destroy!
  if exists?
    run_callbacks :destroy do
      #destroy main object
      RedisModelExtension::Database.redis.del(redis_key) 
      destroy_aliases!
    end
  end
end

#destroy_aliases! ⇒ Object

remove all aliases



97
98
99
100
101
102
103
104
105
106
 
# File 'lib/redis-model-extension/save_destroy.rb', line 97

def destroy_aliases!
  #do it only if it is existing object!
  if redis_old_keys[:aliases].size > 0
    redis_old_keys[:aliases].each do |alias_key|
      RedisModelExtension::Database.redis.srem alias_key, redis_old_keys[:key]
      #delete alias with 0 keys
      RedisModelExtension::Database.redis.del(alias_key) if RedisModelExtension::Database.redis.scard(alias_key).to_i == 0
    end
  end
end

#save ⇒ Object

save method - save all attributes (fields) and create aliases



18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
 
# File 'lib/redis-model-extension/save_destroy.rb', line 18

def save
  perform = lambda do
    # can be saved into redis?
    if valid?

      #autoicrement id
      self.send("id=", increment_id) if redis_key_config.include?(:id) && !self.id?

      #generate key (possibly new)
      generated_key = redis_key        

      #take care about renaming saved hash in redis (if key changed)
      if redis_old_keys[:key] && redis_old_keys[:key] !=  generated_key && RedisModelExtension::Database.redis.exists(redis_old_keys[:key])
        RedisModelExtension::Database.redis.rename(redis_old_keys[:key], generated_key)
      end

      #ignore nil values for save 
      args = self.class.redis_save_fields_with_nil_conf ? to_arg : to_arg.reject{|k,v| v.nil?}

      #perform save to redis hash
      RedisModelExtension::Database.redis.hmset(generated_key, *args.inject([]){ |arr,kv| arr + [kv[0], value_to_redis(kv[0], kv[1])]})
      
      # destroy aliases
      destroy_aliases!
      create_aliases

      #after save make sure instance remember old key to know if it needs to be ranamed
      store_keys
    end
  end

  run_callbacks :save do
    unless exists?
      run_callbacks :create do
        perform.()
      end
    else
      perform.()
    end
  end
  unless errors.any?
    return self
  else
    return false
  end
end

#update(args) ⇒ Object

update multiple attrubutes at once



74
75
76
77
78
79
80
81
 
# File 'lib/redis-model-extension/save_destroy.rb', line 74

def update args
  args.each do |key, value|
    method = "#{key}=".to_sym 
    if self.respond_to? method
      self.send(method, value)
    end
  end
end