Validate not nil, min and max for a string

The following validation code doesn't work:

attributes do
  uuid_primary_key :id

  attribute :content, :string do
    allow_nil? false
    constraints: [min_length: 1, max_length: 255]
  end
end

attributes do
  uuid_primary_key :id

  attribute :content, :string do
    allow_nil? false
    constraints: [min_length: 1, max_length: 255]
  end
end

In the documentation I can only find examples for allow_nil? or constraints: [min_length: 1, max_length: 255] but none where both are combined. How do I have to change the code to work?

4 Replies

ZachDaniel•2y ago

    constraints [min_length: 1, max_length: 255]

    constraints [min_length: 1, max_length: 255]

Stefan WintermeyerOP•2y ago

How can I use the do ... end syntax with this validation?

attribute :priority, :integer, allow_nil?: true, constraints: [min: 1, max: 3]

attribute :priority, :integer, allow_nil?: true, constraints: [min: 1, max: 3]

barnabasj•2y ago

the do end is an alternative syntax, you have the required arguments first and then the options as a keyword list last. instead of passing it as a keyword list you can also use the do end block.

attribute :priority, :integer do
  allow_nil? true 
  constraints [min: 1, max: 3]
end

attribute :priority, :integer do
  allow_nil? true 
  constraints [min: 1, max: 3]
end

Stefan WintermeyerOP•2y ago

Thanks @barnabasj !

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Validate not nil, min and max for a string

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