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crud

Author: baruch

Diff for: crud101.md

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+# Crud 101
+
+
+ps -ef |grep mongo |grep -v grep |awk '{print "kill " $2}'
+rm -rf /u01/data/mongo01
+mkdir --p /u01/data/mongo01
+
+mongod --dbpath /u01/data/mongo01 --logpath /u01/data/mongo01/log.log  --logappend  --oplogSize 10 --smallfiles --fork
+
+
+mongoimport --drop -d pcat -c products /u01/demo/products.json
+
+
+
+```js
+
+db.products.insertMany([
+{ "_id" : "ac3", "name" : "AC3 Phone", "brand" : "ACME", "type" : "phone", "price" : 200, "warranty_years" : 1, "available" : true },
+{ "_id" : "ac7", "name" : "AC7 Phone", "brand" : "ACME", "type" : "phone", "price" : 320, "warranty_years" : 1, "available" : false }
+])
+
+db.products.find({})
+
+db.products.insertOne({
+    "_id" : "ac9",
+    "name" : "AC9 Phone",
+    "brand" : "ACME",
+    "type" : "phone",
+    "price" : 333,
+    "warranty_years" : 0.25,
+    "available" : true
+})
+
+// select * from  products where id = "ac9"
+db.products.find("_id" : "ac9");
+
+/// lets use varibales 
+
+t = db.products
+
+//set myobj to one josn
+t = db.products
+myobj = t.findOne({_id : ObjectId("507d95d5719dbef170f15c00")})
+
+myobj.limits.voice
+
+
+//change term_years to 3
+myobj.term_years=3
+//save
+t.save(myobj)
+myobj.limits.sms.over_rate=0.01
+t.save(myobj)
+
+myobj = t.findOne({_id : ObjectId("507d95d5719dbef170f15c00")})
+
+
+
+
+t.find({"limits.voice":{$exists:true}})
+
+t.find({"limits.voice":{$exists:true}}).count()
+
+// 3
+
+
+// function
+productscode = { }
+
+productscode.b = function() { 
+    var x = db.products.findOne( { _id : ObjectId("507d95d5719dbef170f15c00") } );
+    if( x == null ) { 
+        print("hmmm, something isn't right? try again");
+        return 0;
+    }
+    return "" + x.limits.voice.over_rate + x.limits.sms.over_rate + x.monthly_price + x.term_years + db.products.find({term_years:3}).count();
+}
+
+
+
+````
+