Class: Cassie::Statements::Statement::Assignment

Inherits:
Object
  • Object
show all
Defined in:
lib/cassie/statements/statement/assignment.rb

Overview

set “username = ?”, value: :username

set :favs, term: 'favs + ?', value: "{ 'movie' : 'Cassablanca' }"
set :username

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(source, identifier, value_method, opts = {}) ⇒ Assignment

Returns a new instance of Assignment.



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# File 'lib/cassie/statements/statement/assignment.rb', line 13

def initialize(source, identifier, value_method, opts={})
  @source = source
  @identifier = identifier
  @value_method = value_method
  @enabled = opts.has_key?(:if) ? source_eval(opts[:if]) : true
  @term = opts.has_key?(:term) ? source_eval(opts[:term]) : "?"
end

Instance Attribute Details

#enabled ⇒ Object (readonly)

cassandra.apache.org/doc/cql3/CQL.html#updateStmt



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# File 'lib/cassie/statements/statement/assignment.rb', line 8

def enabled
  @enabled
end

#identifier ⇒ Object (readonly)

cassandra.apache.org/doc/cql3/CQL.html#updateStmt



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# File 'lib/cassie/statements/statement/assignment.rb', line 8

def identifier
  @identifier
end

#source ⇒ Object (readonly)

cassandra.apache.org/doc/cql3/CQL.html#updateStmt



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# File 'lib/cassie/statements/statement/assignment.rb', line 8

def source
  @source
end

#value_method ⇒ Object (readonly)

cassandra.apache.org/doc/cql3/CQL.html#updateStmt



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# File 'lib/cassie/statements/statement/assignment.rb', line 8

def value_method
  @value_method
end

Instance Method Details

#argument ⇒ Object 



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# File 'lib/cassie/statements/statement/assignment.rb', line 38

def argument
  value if argument?
end

#argument? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cassie/statements/statement/assignment.rb', line 34

def argument?
  positional?
end

#enabled? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cassie/statements/statement/assignment.rb', line 30

def enabled?
  !!enabled
end

#positional? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cassie/statements/statement/assignment.rb', line 46

def positional?
  term.to_s.include?("?")
end

#term ⇒ Object 



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# File 'lib/cassie/statements/statement/assignment.rb', line 42

def term
  @term if enabled?
end

#to_update_cql ⇒ Object 



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# File 'lib/cassie/statements/statement/assignment.rb', line 50

def to_update_cql
  "#{identifier} = #{term}" if enabled?
end

#value ⇒ Object 



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# File 'lib/cassie/statements/statement/assignment.rb', line 25

def value
  return @value if defined?(@value)
  @value = source.send(value_method)
end