我无法弄清楚我在这里做错了什么。我使用pymongo并具有以下的map/reduce代码(该文件的所有属性都可以直接访问 - 即没有预埋件与此有关:pymongo用户声明:13606:'out'必须是字符串或对象
(文件getTableMap.js):
function() {
var tablePoints1 = 0;
var tablePoints2 = 0;
if (this.pointsTeam1 == this.pointsTeam2) {
tablePoints1 = 1;
tablePoints2 = 1;
}
else {
if (this.pointsTeam1 > this.pointsTeam2) {
tablePoints1 = 3;
}
else {
tablePoints2 = 3;
}
}
emit(this.idTeam1, [tablePoints1, this.pointsTeam1, this.pointsTeam2]);
emit(this.idTeam2, [tablePoints2, this.pointsTeam2, this.pointsTeam1]);
}
的它调用map_reduce Python代码看起来是这样的:
def getTableOnMatchday(self):
m = Code(open('getTableMap.js','r').read())
r = Code("""function(k,values) {
var foo = 'foo';
return(foo);
}""")
result = bl_1.map_reduce(m, r, "myresult")
for doc in result.find():
print doc
对于Python代码我适应直接从文档的简单例子: http://api.mongodb.org/python/current/examples/map_reduce.htmlMap Reduce example from pymongo 2.0.1 documentation
Python的回溯,当我运行代码,我得到的是:
>>> api.getTableOnMatchday()
Traceback (most recent call last):
pymongo.errors.OperationFailure: command SON([('mapreduce', u'bl1_2011'),
...
...
...
) failed: db assertion failure
这并没有确切地告诉我很多,所以我把上详细的日志记录的mongod,发现这个在日志中:
Thu Sep 15 21:04:02 [conn7] User Assertion: 13606:'out' has to be a string
or an object
从查看实际生成map_reduce调用的Python代码,第三个参数('out',根据pymongo 2.0.1文档)是'myresult',这当然是一个字符串。
pymongo在这里抱怨什么? Javascript在语法上是正确的(我认为)。我知道reduce现在什么都不做,但是这不应该阻止编译命令serverside - 或者它可以吗?