Question

我更喜欢使用ruby，rails，heroku甚至更新的RMagick。我已经尝试了几种解决方案，在堆栈溢出时使用Heroku上的RMagick，没有结果。这是我遇到的一个有趣的路障。

我创建了一个工作函数，只有在文本超出给定长度时才能确定要修改的正确字体大小。一切都在我的本地机器上运行得很好。但是，一旦尝试在heroku上，似乎RMagick要么没有安装，要么没有被识别。它看起来像heroku控制台引用ruby 1.9.1，这与它有什么关系吗？我正在继续研究这个问题，但如果有人对此事有任何想法，我会很感兴趣。

非常感谢

* LOCAL MACHINE RUBY 1.8.7 RAILS CONSOLE ***

1.8.7 :001 > def find_width(string, typeface, font_size)
1.8.7 :002?>   max_width = 1087
1.8.7 :003?>   type_size = font_size.to_i
1.8.7 :004?>   label = Magick::Draw.new
1.8.7 :005?>   label.font = typeface
1.8.7 :006?>   label.pointsize = type_size
1.8.7 :007?>   label.text_antialias(true)
1.8.7 :008?>   label.text(0,0,string)
1.8.7 :009?>   metrics = label.get_type_metrics(string)
1.8.7 :010?>   width = metrics.width
1.8.7 :011?>   if width > max_width
1.8.7 :012?>     adjusted_size = type_size * max_width / width
1.8.7 :013?>     return adjusted_size.to_i
1.8.7 :014?>     else
1.8.7 :015 >       return font_size
1.8.7 :016?>     end
1.8.7 :017?>   end
=> nil 
1.8.7 :018 > find_width("HI", "blackjar-webfont", "263pt")
=> "263pt" 
1.8.7 :019 > find_width("This is a test!", "blackjar-webfont", "263pt")
=> 185 
1.8.7 :020 >

* LOCAL MACHINE RUBY 1.9.2 RAILS CONSOLE ***

Loading development environment (Rails 3.0.7)
1.9.2p290 :001 > def find_width(string, typeface, font_size)
1.9.2p290 :002?>   max_width = 1087
1.9.2p290 :003?>   type_size = font_size.to_i
1.9.2p290 :004?>   label = Magick::Draw.new
1.9.2p290 :005?>   label.font = typeface
1.9.2p290 :006?>   label.pointsize = type_size
1.9.2p290 :007?>   label.text_antialias(true)
1.9.2p290 :008?>   label.text(0,0,string)
1.9.2p290 :009?>   metrics = label.get_type_metrics(string)
1.9.2p290 :010?>   width = metrics.width
1.9.2p290 :011?>   if width > max_width
1.9.2p290 :012?>     adjusted_size = type_size * max_width / width
1.9.2p290 :013?>     return adjusted_size.to_i
1.9.2p290 :014?>     else
1.9.2p290 :015 >       return font_size
1.9.2p290 :016?>     end
1.9.2p290 :017?>   end
=> nil 
1.9.2p290 :018 > find_width("HI", "blackjar-webfont", "263pt")
=> "263pt" 
1.9.2p290 :019 > find_width("This is a test!", "blackjar-webfont", "263pt")
=> 185 
1.9.2p290 :020 >

的的 ** * ** * ** * 的 HEROKU CONSOLE * ** * ** * ****

Loading production environment (Rails 3.0.7)
irb(main):001:0> def find_width(string, typeface, font_size)
irb(main):002:1> max_width = 1087
irb(main):003:1> type_size = font_size.to_i
irb(main):004:1> label = Magick::Draw.new
irb(main):005:1> label.font = typeface
irb(main):006:1> label.pointsize = type_size
irb(main):007:1> label.text_antialias(true)
irb(main):008:1> label.text(0,0,string)
irb(main):009:1> metrics = label.get_type_metrics(string)
irb(main):010:1> width = metrics.width
irb(main):011:1> if width > max_width
irb(main):012:2> adjusted_size = type_size * max_width / width
irb(main):013:2> return adjusted_size.to_i
irb(main):014:2> else
irb(main):015:2* return font_size
irb(main):016:2> end
irb(main):017:1> end
=> nil
irb(main):018:0> find_width("HI", "blackjar-webfont", "263pt")
NameError: uninitialized constant Magick from /app/vendor/bundle/ruby/1.9.1/gems/aws-s3-0.6.2/lib/aws/s3/extensions.rb:206:in `const_missing_from_s3_library'
from (irb):4:in `find_width'
from (irb):18
from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.0.7/lib/rails/commands/console.rb:44:in `start'
from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.0.7/lib/rails/commands/console.rb:8:in `start'
from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.0.7/lib/rails/commands.rb:23:in `<top (required)>'from script/rails:6:in `require'from script/rails:6:in `<main>'
irb(main):019:0>

功能代码

def find_width(string, typeface, font_size)
    max_width = 1087
    type_size = font_size.to_i
    label = Magick::Draw.new
    label.font = typeface
    label.pointsize = type_size
    label.text_antialias(true)
    label.text(0,0,string)
    metrics = label.get_type_metrics(string)
    width = metrics.width
    if width > max_width
        adjusted_size = type_size * max_width / width
        return adjusted_size.to_i
    else
        return font_size
    end
end

尝试在Heroku上使用RMagik时出错

0 个答案: