Unix If Then 在 Do Loop 中不起作用

Question

我试图通过在我的 DO DONE 语句中实现 IF THEN ELIF 语句来更改与 $i 的不同值相对应的特定变量值。我花了几个小时试图解决这个问题，但结果总是为campaign_data_id 和companion_id 重复相同的值。 IF THEN 之外的其他值确实可以正常工作。有人知道解决办法吗？

#!/bin/sh 
for i in brand1 brand2 brand3 brand4 brand5 brand6 
 do 
 brand=$i
 campaign_id="$brand"_version2
 source_table=db_name."$brand"_table
 if [ "$brand"=brand1 ] 
    then 
      campaign_data_id=2059 
      companion_id=000495 
   elif [ $brand=brand2 ] 
    then 
      campaign_data_id=2118 
      companion_id=004994 
   elif [ $brand==brand3 ] 
    then 
      campaign_data_id=2181 
      companion_id001224 
   elif [ $brand==brand4 ] 
    then 
      campaign_data_id=2061 
      companion_id=000973 
   elif [ $brand==brand5 ] 
    then 
      campaign_data_id=2131 
      companion_id=003453 
   elif [ $brand==brand6 ] 
    then 
      campaign_data_id=2113 
      companion_id=003453 
   else 
    echo SETTINGS NOT COMPLETE 
fi

echo $brand $campaign_id $source_table $campaign_data_id $companion_id
done

这是输出（不正确）

brand1 brand1_version2 db_name.brand1_table 2059 000495
brand2 brand2_version2 db_name.brand2_table 2059 000495
brand3 brand3_version2 db_name.brand3_table 2059 000495
brand4 brand4_version2 db_name.brand4_table 2059 000495
brand5 brand5_version2 db_name.brand5_table 2059 000495
brand6 brand6_version2 db_name.brand6_table 2059 000495

Answer 1

您的错误在于您在 ELSEIF 条件中使用的文本比较。比较两个字符串时，都应该用引号引起来，并且单个“=”符号是正确的比较器。见Reference。我用空格包围了字符串，不确定是否需要，但这是我的习惯。还更正了第 18 行的错字，其中缺少“=”。这应该给出正确的输出：

#!/bin/sh
for i in brand1 brand2 brand3 brand4 brand5 brand6
  do
    brand=$i
    campaign_id=${brand}_version2
    source_table=db_name."$brand"_table
    if [ "${brand}" = "brand1" ]
      then
      campaign_data_id=2059
      companion_id=000495
    elif [ "${brand}" = "brand2" ]
      then
      campaign_data_id=2118
      companion_id=004994
    elif [ "${brand}" = "brand3" ]
      then
      campaign_data_id=2181
      companion_id=001224
    elif [ "${brand}" = "brand4" ]
      then
      campaign_data_id=2061
      companion_id=000973
    elif [ "${brand}" = "brand5" ]
      then
      campaign_data_id=2131
      companion_id=003453
    elif [ "${brand}" = "brand6" ]
      then
      campaign_data_id=2113
      companion_id=003453
    else
      echo SETTINGS NOT COMPLETE
fi
echo $brand $campaign_id $source_table $campaign_data_id $companion_id
done