87 lines
2.6 KiB
Ruby
87 lines
2.6 KiB
Ruby
module ActionView
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# The TemplateError exception is raised when the compilation of the template fails. This exception then gathers a
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# bunch of intimate details and uses it to report a very precise exception message.
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class TemplateError < ActionViewError #:nodoc:
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SOURCE_CODE_RADIUS = 3
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attr_reader :original_exception
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def initialize(base_path, file_name, assigns, source, original_exception)
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@base_path, @assigns, @source, @original_exception =
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base_path, assigns, source, original_exception
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@file_name = file_name
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end
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def message
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original_exception.message
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end
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def sub_template_message
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if @sub_templates
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"Trace of template inclusion: " +
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@sub_templates.collect { |template| strip_base_path(template) }.join(", ")
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else
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""
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end
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end
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def source_extract(indention = 0)
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source_code = IO.readlines(@file_name)
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start_on_line = [ line_number - SOURCE_CODE_RADIUS - 1, 0 ].max
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end_on_line = [ line_number + SOURCE_CODE_RADIUS - 1, source_code.length].min
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line_counter = start_on_line
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extract = source_code[start_on_line..end_on_line].collect do |line|
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line_counter += 1
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"#{' ' * indention}#{line_counter}: " + line
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end
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extract.join
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end
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def sub_template_of(file_name)
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@sub_templates ||= []
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@sub_templates << file_name
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end
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def line_number
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if file_name
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regexp = /#{Regexp.escape File.basename(file_name)}:(\d+)/
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[@original_exception.message, @original_exception.clean_backtrace].flatten.each do |line|
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return $1.to_i if regexp =~ line
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end
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end
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0
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end
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def file_name
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stripped = strip_base_path(@file_name)
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stripped[0] == ?/ ? stripped[1..-1] : stripped
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end
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def to_s
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"\n\n#{self.class} (#{message}) on line ##{line_number} of #{file_name}:\n" +
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source_extract + "\n " +
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original_exception.clean_backtrace.join("\n ") +
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"\n\n"
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end
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def backtrace
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[
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"On line ##{line_number} of #{file_name}\n\n#{source_extract(4)}\n " +
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original_exception.clean_backtrace.join("\n ")
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]
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end
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private
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def strip_base_path(file_name)
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file_name = File.expand_path(file_name).gsub(/^#{Regexp.escape File.expand_path(RAILS_ROOT)}/, '')
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file_name.gsub(@base_path, "")
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end
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end
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end
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Exception::TraceSubstitutions << [/:in\s+`_run_(html|xml).*'\s*$/, ''] if defined?(Exception::TraceSubstitutions)
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Exception::TraceSubstitutions << [%r{^\s*#{Regexp.escape RAILS_ROOT}}, '#{RAILS_ROOT}'] if defined?(RAILS_ROOT)
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