Class: QueryableHash::Wrapper

Inherits:
SimpleDelegator
  • Object
show all
Defined in:
lib/queryable_hash/wrapper.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(hash, nil_value: nil, raise_when_nil: false) ⇒ Wrapper

Returns a new instance of Wrapper.



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# File 'lib/queryable_hash/wrapper.rb', line 7

def initialize(hash, nil_value: nil, raise_when_nil: false)
  @original_hash = hash
  @nil_value = nil_value
  @raise_when_nil = raise_when_nil
  super hash
end

Instance Attribute Details

#nil_value ⇒ Object (readonly)

Returns the value of attribute nil_value.



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# File 'lib/queryable_hash/wrapper.rb', line 5

def nil_value
  @nil_value
end

#raise_when_nil ⇒ Object (readonly)

Returns the value of attribute raise_when_nil.



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# File 'lib/queryable_hash/wrapper.rb', line 5

def raise_when_nil
  @raise_when_nil
end

Instance Method Details

#find_all(*queries, nil_value: nil) ⇒ Object 



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# File 'lib/queryable_hash/wrapper.rb', line 14

def find_all(*queries, nil_value: nil)
  queries.reduce([]) do |memo, query|
    context = self
    query.split(".").each do |name|
      break if context.nil?
      context = context[name.to_sym] || context[name]
    end
    memo << (context || nil_value)
  end
end

#find_first(*queries, nil_value: nil, raise_when_nil: nil) ⇒ Object Also known as: find

Raises:



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# File 'lib/queryable_hash/wrapper.rb', line 25

def find_first(*queries, nil_value: nil, raise_when_nil: nil)
  nil_value = @nil_value if nil_value.nil?
  raise_when_nil = @raise_when_nil if raise_when_nil.nil?

  first = find_all(*queries, nil_value: nil_value).find do |result|
    result != nil_value
  end
  first ||= nil_value

  raise NotFoundError.new("#{queries.join(", ")} not found") if raise_when_nil && first == nil_value
  first
end

#to_hash ⇒ Object 



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# File 'lib/queryable_hash/wrapper.rb', line 40

def to_hash
  @original_hash
end