Class: Presto::Errors

Inherits:
Hash
  • Object
show all
Defined in:
lib/presto/errors.rb

Constant Summary collapse

ATTRIBUTE_JOINER = 
' and '.freeze

Instance Method Summary collapse

Instance Method Details

#add(att, msg) ⇒ Object

Adds an error for the given attribute.

errors.add(:name, 'is not valid') if name == 'invalid'



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# File 'lib/presto/errors.rb', line 8

def add(att, msg)
  fetch(att){self[att] = []} << msg
end

#count ⇒ Object

Return the total number of error messages.

errors.count # => 3



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# File 'lib/presto/errors.rb', line 15

def count
  values.inject(0){|m, v| m + v.length}
end

#empty? ⇒ Boolean

Return true if there are no error messages, false otherwise.

Returns:

  • (Boolean) 


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# File 'lib/presto/errors.rb', line 20

def empty?
  count == 0
end

#full_messages ⇒ Object

Returns an array of fully-formatted error messages.

errors.full_messages
# => ['name is not valid',
#     'hometown is not at least 2 letters']



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# File 'lib/presto/errors.rb', line 29

def full_messages
  inject([]) do |m, kv| 
    att, errors = *kv
    errors.each {|e| m << "#{att} #{e}"}
    m
  end
end

#on(att) ⇒ Object

Returns the array of errors for the given attribute, or nil if there are no errors for the attribute.

errors.on(:name) # => ['name is not valid']
errors.on(:id) # => nil



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# File 'lib/presto/errors.rb', line 42

def on(att)
  if v = fetch(att, nil) and !v.empty?
    v
  end
end