使用 django 和 mongoengine 的子句执行正则表达式查询

Question

我有 JSON 个工作对象，其中工作有一个关键的调用技能，这是一个技能列表。例如

{
    "_id" : ObjectId("552a42cd03462b0728feb180"),
    "did" : "JB77FW6885MCCRGG30T",
    "attributes" : {
        "EducationRequired" : "Bachelor's Degree",
        "ExperienceRequired" : "At least 3 year(s)",
        "ExternalApplication" : "True",
        "City" : "Houston",
        "Company" : "IBM",
        "DegreeRequired" : "4 Year Degree",
        "Skills" : {
            "Skill" : [ 
                "apache hadoop", 
                "etl", 
                "geographic information system", 
                "cloud computing", 
                "mongodb", 
                "nosql", 
                "linux", 
                "spark (programming language)", 
                "java (programming language)", 
                "python (programming language)", 
                "sql", 
                "machine learning", 
                "data management", 
                "data integration"
            ]
        }
    }

}

{
    "_id" : ObjectId("552a42cd03462b0728feb180"),
    "did" : "JB77FW6885MCCRGG30T",
    "attributes" : {
        "EducationRequired" : "Bachelor's Degree",
        "ExperienceRequired" : "At least 5 year(s)",
        "ExternalApplication" : "True",
        "City" : "Boston",
        "Company" : "Microsoft",
        "DegreeRequired" : "4 Year Degree",
        "Skills" : {
            "Skill" : [  
                "java (programming language)", 
                "python (programming language)", 
                "sql", 
                "machine learning", 
                "data management", 
                "data integration"
            ]
        }
    }

}

我想获得 'sql' 或 'java'

的工作

我有以下电话

skills = ['java','sql']
jobs = Job.objects(__raw__={'attributes.Skills.Skill' : {'$in' : skills}})

问题在于它没有 return 具有 'java' 的工作，因为在数据库中技能列表具有 'java (programming language)' 而不仅仅是 'java' .为了解决这个问题，我需要在查询中加入一个正则表达式。所以我尝试了以下方法，但其中 none 有效：

Job.objects(__raw__={'attributes.Skills.Skill' : {'$in' : ['$/.*java.*/']}})  #ignoring sql for now
Job.objects(__raw__={'attributes.Skills.Skill' : {'$in' : ['sql',re.compile('$/.*java.*/', re.IGNORECASE)]}})
Job.objects(__raw__={'attributes.Skills.Skill' : {'$in' : ['sql',re.compile('/.*java.*/', re.IGNORECASE)]}})

对我应该做什么有什么想法吗？

Answer 1

http://docs.mongodb.org/manual/reference/operator/query/regex/#syntax-restrictions

您的正则表达式不正确。试试这些。

Job.objects(__raw__={'attributes.Skills.Skill' : {'$in' : [/.*java.*/i]}})  #ignoring sql for now
Job.objects(__raw__={'attributes.Skills.Skill' : {'$in' : ['sql',re.compile('.*java.*', re.IGNORECASE)]}})

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