Class: Parse::Constraint::EndsWithConstraint

Inherits:
Constraint
  • Object
show all
Defined in:
lib/parse/query/constraints.rb

Overview

Equivalent to using the $regex Parse query operation with a suffix pattern. This is useful for matching fields that end with a specific string.

Find files whose name ends with ".pdf"

File.where(:name.ends_with => ".pdf")

Generates: "name": { "$regex": "\.pdf$", "$options": "i" }

Instance Method Summary collapse

Instance Method Details

#build ⇒ Hash

Returns the compiled constraint.

Returns:

  • (Hash) —

    the compiled constraint.



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# File 'lib/parse/query/constraints.rb', line 2378

def build
  value = formatted_value
  unless value.is_a?(String)
    raise ArgumentError, "#{self.class}: Value must be a string for ends_with constraint"
  end

  # Validate length to prevent performance issues
  if value.length > Parse::RegexSecurity::MAX_PATTERN_LENGTH
    raise ArgumentError, "#{self.class}: Value too long (#{value.length} chars, max #{Parse::RegexSecurity::MAX_PATTERN_LENGTH})"
  end

  # Escape special regex characters in the suffix
  escaped_value = Regexp.escape(value)
  regex_pattern = "#{escaped_value}$"

  { @operation.operand => { :$regex => regex_pattern, :$options => "i" } }
end

#ends_with ⇒ EndsWithConstraint

A registered method on a symbol to create the constraint. Maps to Parse operator "$regex".

Examples:

q.where :field.ends_with => "suffix"

Returns:



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# File 'lib/parse/query/constraints.rb', line 2374

constraint_keyword :$regex