在根据Askeet教程学习Symfony时，有遇到这样一个问题：Unable to find path for class "francoisPeer"，笔者经过仔细研究，终于发现问题所在。

错误代码：

D:\workspace\askeet\batch>php load_data.php
PHP Fatal error:  Uncaught exception ’sfException’ with message ‘Unable to find path for class "francoisPeer".’ in D:\workspace\askeet\lib\vender\symfony\lib\ad on\propel\sfPropelData.class.php:206
Stack trace:
#0 D:\workspace\askeet\lib\vender\symfony\lib\addon\propel\sfPropelData.class.ph
p(46): sfPropelData->doDeleteCurrentData(Array)
#1 D:\workspace\askeet\batch\load_data.php(24): sfPropelData->loadData(‘D:\works
pace\as…’)
#2 {main}
  thrown in D:\workspace\askeet\lib\vender\symfony\lib\addon\propel\sfPropelData
.class.php on line 206

Fatal error: Uncaught exception ’sfException’ with message ‘Unable to find path
for class "francoisPeer".’ in D:\workspace\askeet\lib\vender\symfony\lib\addon\p
ropel\sfPropelData.class.php:206
Stack trace:
#0 D:\workspace\askeet\lib\vender\symfony\lib\addon\propel\sfPropelData.class.ph
p(46): sfPropelData->doDeleteCurrentData(Array)
#1 D:\workspace\askeet\batch\load_data.php(24): sfPropelData->loadData(‘D:\works
pace\as…’)
#2 {main}   thrown in D:\workspace\askeet\lib\vender\symfony\lib\addon\propel\sfPropelData .class.php on line 206

这个错误是test_data.yml文件格式书写错误导致的。因为直接拷贝网页上给出的yaml代码会有多余的空格，而yaml文件正是有空格控制格式的，所以要严格按照规范书写。