JsonDB的一个使用实例-PHP开发-PHP中文网

JsonDB的一个使用实例

巴扎黑

发布： 2016-11-07 10:30:41

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JsonDB是一个python实现的基于JSON格式的轻量级数据库开源项目，你可以通过github进行下载和安装，项目地址是：https://github.com/hujiang001/jsonDB/ 。

作者提供了完整的参考文档，而且是中文的，所以上手非常容易，这是他的中文文档的地址：https://github.com/hujiang001/jsonDB/wiki/reference-document 。当前在项目工程里面也是包含了这个文档：reference.md。

项目还提供了一个使用的实例，在example.py中，下面我们把这个例子粘贴出来，上面有详细的注释，可以看出使用起来还是挺简单的：

#!usr/bin/env python# -*- coding: utf-8 -*-from database import JSONDBif __name__=="__main__":
    shopDb = JSONDB(&#39;shop_db&#39;,hashSize=1)  #create shop db
    userDb = JSONDB(&#39;sellerDb&#39;,hashSize=1) #create user db
    #specify key
    shopDb.ensureKey(&#39;shop&#39;,[&#39;id&#39;])
    shopDb.ensureKey(&#39;goods&#39;,[&#39;id&#39;])
    userDb.ensureKey(&#39;seller&#39;,[&#39;id&#39;,&#39;name&#39;])
    userDb.ensureKey(&#39;customer&#39;,[&#39;id&#39;,&#39;name&#39;])    #for debugging, you can start perfDot and open debug switch
    shopDb.perfDotStart()
    userDb.perfDotStart()
    shopDb.debugSwitch(1)
    userDb.debugSwitch(1)    #insert data
    #here we insert some data
    for i in range(0,100):        #insert data one by one
        shopDb.insert(&#39;shop&#39;,[{&#39;id&#39;:i, &#39;name&#39;:&#39;my shop&#39;, &#39;description&#39;:&#39;this is a telephone shop&#39;}])    #inset a data list
    goodsList = [{&#39;id&#39;:10001, &#39;class&#39;:&#39;telephone&#39;, &#39;brand&#39;:&#39;apple&#39;, &#39;color&#39;:&#39;white&#39;},
                 {&#39;id&#39;:10002, &#39;class&#39;:&#39;telephone&#39;, &#39;brand&#39;:&#39;huawei&#39;, &#39;color&#39;:&#39;black&#39;},
                 {&#39;id&#39;:10003, &#39;class&#39;:&#39;telephone&#39;, &#39;brand&#39;:&#39;zte&#39;, &#39;color&#39;:&#39;white&#39;},
                 {&#39;id&#39;:10004, &#39;class&#39;:&#39;telephone&#39;, &#39;brand&#39;:&#39;xiaomi&#39;, &#39;color&#39;:&#39;black&#39;},
                 {&#39;id&#39;:10005, &#39;class&#39;:&#39;telephone&#39;, &#39;brand&#39;:&#39;moto&#39;, &#39;color&#39;:&#39;white&#39;},
                 {&#39;id&#39;:10006, &#39;class&#39;:&#39;telephone&#39;, &#39;brand&#39;:&#39;oppo&#39;, &#39;color&#39;:&#39;black&#39;},]
    shopDb.insert(&#39;goods&#39;,goodsList)
    sellersList = [{&#39;id&#39;:0x34200,&#39;name&#39;:&#39;li&#39;,&#39;sex&#39;:&#39;female&#39;,&#39;birth&#39;:&#39;1985-09-03&#39;,&#39;tel&#39;:&#39;0816-19876545432&#39;},
                   {&#39;id&#39;:0x34201,&#39;name&#39;:&#39;wang&#39;,&#39;sex&#39;:&#39;male&#39;,&#39;birth&#39;:&#39;1988-11-03&#39;,&#39;tel&#39;:&#39;0816-2345453453&#39;},
                   {&#39;id&#39;:0x34202,&#39;name&#39;:&#39;hong&#39;,&#39;sex&#39;:&#39;female&#39;,&#39;birth&#39;:&#39;1995-10-19&#39;,&#39;tel&#39;:&#39;0816-144567589&#39;}]
    userDb.insert(&#39;seller&#39;,sellersList)
    customersList = [{&#39;id&#39;:0x7800,&#39;name&#39;:&#39;zhu&#39;,&#39;sex&#39;:&#39;female&#39;,&#39;profile&#39;:[&#39;dress&#39;,&#39;mother&#39;,&#39;sport&#39;]},
                   {&#39;id&#39;:0x7801,&#39;name&#39;:&#39;rong&#39;,&#39;sex&#39;:&#39;male&#39;,&#39;profile&#39;:[&#39;baby&#39;,&#39;read&#39;,&#39;tech&#39;]},
                   {&#39;id&#39;:0x7802,&#39;name&#39;:&#39;guo&#39;,&#39;sex&#39;:&#39;female&#39;,&#39;profile&#39;:[&#39;phone&#39;,&#39;dress&#39;,&#39;food&#39;]}]
    userDb.insert(&#39;customer&#39;,customersList)    #export to default file
    shopDb.exportToFile()
    userDb.exportToFile(fileName=&#39;user&#39;)    #find
    # find with key
    findList = shopDb.find(&#39;goods&#39;,filter={&#39;id&#39;:{&#39;$lt&#39;:10004}})
    JSONDB.rprint(findList)
    findList = shopDb.find(&#39;goods&#39;,filter={&#39;id&#39;:10004})
    JSONDB.rprint(findList)
    findList = userDb.find(&#39;customer&#39;,filter={&#39;name&#39;:&#39;guo&#39;})
    JSONDB.rprint(findList)    #delete
    shopDb.delete(&#39;goods&#39;,{&#39;id&#39;:10005})    #update
    shopDb.update(&#39;goods&#39;,set={&#39;class&#39;:&#39;phone&#39;})    #merge
    shopDb.merge(userDb)
    shopDb.exportToFile(&#39;mergeDb&#39;)    #show pref time
    shopDb.perfDotEnd()
    userDb.perfDotEnd()    #import
    importDb = JSONDB(&#39;importDb&#39;)
    importDb.debugSwitch(1)
    importDb.importFromFile(fileName=&#39;mergeDb&#39;)    #importDb.printAll()
    importDb.exportToFile()    print importDb

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