84 lines
2.5 KiB
Ruby
84 lines
2.5 KiB
Ruby
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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, @file_name, @assigns, @source, @original_exception =
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base_path, file_name, assigns, source, original_exception
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end
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def message
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if original_exception.message.include?("(eval):")
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original_exception.message.scan(/\(eval\):(?:[0-9]*):in `.*'(.*)/).first.first
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else
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original_exception.message
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end
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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
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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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"#{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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begin
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@original_exception.backtrace.join.scan(/\((?:erb)\):([0-9]*)/).first.first.to_i
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rescue
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begin
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original_exception.message.scan(/\((?:eval)\):([0-9]*)/).first.first.to_i
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rescue
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1
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end
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end
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end
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def file_name
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strip_base_path(@file_name)
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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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clean_backtrace(original_exception).join("\n ") +
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"\n\n"
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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.gsub(@base_path, "")
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end
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def clean_backtrace(exception)
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base_dir = File.expand_path(File.dirname(__FILE__) + "/../../../../")
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exception.backtrace.collect { |line| line.gsub(base_dir, "").gsub("/public/../config/environments/../../", "").gsub("/public/../", "") }
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end
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end
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end
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