Feature : adding 'range' option to Chart API npm v0.3.1

README.md

@@ -73,7 +73,7 @@ Powered by popular node packages : ([express](https://github.com/expressjs/expre
 * Group By, Having (as query params) :fire::fire:  
 * Group By, Having (as a separate API) :fire::fire:  
 * Multiple group by in one API :fire::fire:  
-* Chart API for numeric column :fire::fire:
+* Chart API for numeric column :fire::fire::fire::fire::fire::fire:
 * Supports views  
 * Prototyping (features available when using local MySql server only)
     * Run dynamic queries :fire::fire::fire:
@@ -431,11 +431,11 @@ response body
 ## Chart 
 [:arrow_heading_up:](#api-overview)
 
-:fire::fire: **[ HOTNESS ALERT ]**
+:fire::fire::fire::fire::fire::fire: **[ HOTNESS ALERT ]**
 
 Chart API returns distribution of a numeric column in a table
 
-It comes in three flavours
+It comes in **SIX** powerful flavours
 
 1. Chart : With min, max, step in query params :fire::fire:
 [:arrow_heading_up:](#api-overview)
@@ -550,6 +550,55 @@ Response
 
 ```
 
+4. Chart : With min, max, step in query params :fire::fire:
+ [:arrow_heading_up:](#api-overview)
+ 
+ This API returns the number of rows where amount is between (0,25000), (0,50000) ... (0,maxValue)
+ 
+ Number of records for amount is calculated everytime from min value to extended Range instead of incremental steps
+ 
+ ```
+ /api/payments/chart?_fields=amount&min=0&max=131000&step=25000&range=1
+ 
+ Response
+ 
+[
+    {
+        "amount": "0 to 25000",
+        "_count": 107
+    },
+    {
+        "amount": "0 to 50000",
+        "_count": 231
+    },
+    {
+        "amount": "0 to 75000",
+        "_count": 261
+    },
+    {
+        "amount": "0 to 100000",
+        "_count": 268
+    },
+    {
+        "amount": "0 to 125000",
+        "_count": 273
+    }
+]
+ 
+ ```
+
+5. Range can be specified to other variations of chart operation #2 and #3 like below
+
+ ```
+/api/payments/chart?_fields=amount&steparray=0,10000,20000,70000,140000
+ ```
+ 
+6.
+
+```
+/api/payments/chart?_fields=amount&range=1
+```
+
 Please Note:
 _fields in Chart API can only take numeric column as its argument.  
 

lib/util/cmd.helper.js

@@ -11,7 +11,7 @@ program.on('--help', () => {
 })
 
 program
-  .version('0.3.0')
+  .version('0.3.1')
   .option('-h, --host <n>', 'hostname / localhost by default')
   .option('-u, --user <n>', 'username of database / root by default')
   .option('-p, --password <n>', 'password of database / empty by default')

lib/util/data.helper.js

@@ -66,7 +66,7 @@ exports.numberGetFixed = (number) => {
   return parseInt(number.toFixed())
 }
 
-exports.getRangeSimple = function (min, max, step) {
+exports.getStepArraySimple = function (min, max, step) {
 
   var arr = []
   for (var i = min; i <= max; i = i + step) {
@@ -77,7 +77,7 @@ exports.getRangeSimple = function (min, max, step) {
 
 };
 
-exports.getRange = (min, max, stddev) => {
+exports.getStepArray = (min, max, stddev) => {
 
   // console.log(' = = = = = = = ');
   //console.log('original numbers', min, max, stddev);

lib/xapi.js

@@ -772,7 +772,16 @@ class Xapi {
     let params = []
     let obj = {}
 
-    if (req.query && req.query._fields) {
+
+    if (req.query) {
+
+      let isRange = false
+
+      if (req.query.range) {
+
+        isRange = true
+      }
+
 
       if (req.query && req.query.min && req.query.max && req.query.step) {
 
@@ -782,14 +791,16 @@ class Xapi {
           req.query._fields,
           parseInt(req.query.min),
           parseInt(req.query.max),
-          parseInt(req.query.step))
+          parseInt(req.query.step),
+          isRange)
 
 
       } else if (req.query && req.query.steparray && req.query.steparray.length > 1) {
 
         obj = this.mysql.getChartQueryAndParamsFromStepArray(req.app.locals._tableName,
           req.query._fields,
-          (req.query.steparray.split(',')).map(Number))
+          (req.query.steparray.split(',')).map(Number),
+          isRange)
 
 
       } else {
@@ -814,7 +825,8 @@ class Xapi {
           req.query._fields,
           results[0]['min'],
           results[0]['max'],
-          results[0]['stddev']
+          results[0]['stddev'],
+          isRange
         )
 
       }

lib/xsql.js

@@ -592,16 +592,16 @@ class Xsql {
 
   }
 
-  getChartQueryAndParamsFromStepArray(tableName, columnName, stepArray) {
+  getChartQueryAndParamsFromStepArray(tableName, columnName, stepArray, isRange = false) {
 
     let obj = {}
 
     obj.query = ''
     obj.params = []
 
-    if (stepArray.length && stepArray.length >= 2) {
+    //console.log('getChartQueryAndParamsFromStepArray',isRange);
 
-      let params = [tableName, columnName, stepArray[0], stepArray[1]]
+    if (stepArray.length && stepArray.length >= 2) {
 
       for (let i = 0; i < stepArray.length - 1; i = i + 1) {
 
@@ -610,16 +610,27 @@ class Xsql {
           obj.query = obj.query + ' union '
         }
 
-        if (i) {
+        if (i && isRange === false) {
           stepArray[i] = stepArray[i] + 1
         }
 
-        obj.params.push((stepArray[i]) + ' to ' + stepArray[i + 1])
+        if (isRange === false) {
+          obj.params.push((stepArray[i]) + ' to ' + stepArray[i + 1])
+        } else {
+          obj.params.push((stepArray[0]) + ' to ' + stepArray[i + 1])
+        }
+
         obj.params.push(columnName)
         obj.params.push(tableName)
         obj.params.push(columnName)
-        obj.params.push(stepArray[i])
-        obj.params.push(stepArray[i + 1])
+
+        if (isRange === false) {
+          obj.params.push(stepArray[i])
+          obj.params.push(stepArray[i + 1])
+        } else {
+          obj.params.push(stepArray[0])
+          obj.params.push(stepArray[i + 1])
+        }
 
       }
 
@@ -632,13 +643,13 @@ class Xsql {
   }
 
 
-  getChartQueryAndParamsFromMinMaxStddev(tableName, columnName, min, max, stddev) {
+  getChartQueryAndParamsFromMinMaxStddev(tableName, columnName, min, max, stddev, isRange = false) {
 
-    let stepArray = dataHelp.getRange(min, max, stddev)
+    let stepArray = dataHelp.getStepArray(min, max, stddev)
 
     //console.log('steparray', stepArray);
 
-    let obj = this.getChartQueryAndParamsFromStepArray(tableName, columnName, stepArray)
+    let obj = this.getChartQueryAndParamsFromStepArray(tableName, columnName, stepArray, isRange)
 
     //console.log('steparray', obj);
 
@@ -646,13 +657,13 @@ class Xsql {
 
   }
 
-  getChartQueryAndParamsFromMinMaxStep(tableName, columnName, min, max, step) {
+  getChartQueryAndParamsFromMinMaxStep(tableName, columnName, min, max, step, isRange = false) {
 
-    let stepArray = dataHelp.getRangeSimple(min, max, step)
+    let stepArray = dataHelp.getStepArraySimple(min, max, step)
 
     //console.log('steparray', stepArray);
 
-    let obj = this.getChartQueryAndParamsFromStepArray(tableName, columnName, stepArray)
+    let obj = this.getChartQueryAndParamsFromStepArray(tableName, columnName, stepArray, isRange)
 
     //console.log('steparray', obj);
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "xmysql",
-  "version": "0.3.0",
+  "version": "0.3.1",
   "description": "One command to generate REST APIs for any MySql database",
   "main": "index.js",
   "scripts": {

tests/tests.js

@@ -783,7 +783,8 @@ describe('xmysql : tests', function () {
       });
   });
 
-  // something weird going on
+  // SOMETHING WEIRD HERE
+  //        test in travis show 7 but on local machine result has 6 elements
   // it('GET /api/productlines?_where=(htmlDescription,is,null) should PASS', function (done) {
   //
   //   //post to an url with data
@@ -1203,6 +1204,28 @@ describe('xmysql : tests', function () {
       });
   })
 
+  it('GET /api/payments/chart?_fields=amount&min=0&max=131000&step=25000&range=1 should PASS', function (done) {
+
+    //post to an url with data
+    agent.get('/api/payments/chart?_fields=amount&min=0&max=131000&step=25000&range=1')     //enter url
+      .expect(200)//200 for success 4xx for failure
+      .end(function (err, res) {
+        // Handle /api/v error
+        if (err) {
+          return done(err);
+        }
+
+        res.body.length.should.be.equals(5)
+        res.body[4]['_count'].should.be.equals(273)
+        res.body[1]['_count'].should.be.equals(231)
+        res.body[0]['_count'].should.be.equals(107)
+
+
+        return done();
+
+      });
+  })
+
   it('GET /api/payments/chart?_fields=amount&steparray=0,50000,100000,140000 should PASS', function (done) {
 
     //post to an url with data
@@ -1224,6 +1247,47 @@ describe('xmysql : tests', function () {
       });
   })
 
+  it('GET /api/payments/chart?_fields=amount&steparray=0,50000,100000,140000&range=1 should PASS', function (done) {
+
+    //post to an url with data
+    agent.get('/api/payments/chart?_fields=amount&steparray=0,50000,100000,140000&range=1')     //enter url
+      .expect(200)//200 for success 4xx for failure
+      .end(function (err, res) {
+        // Handle /api/v error
+        if (err) {
+          return done(err);
+        }
+
+        res.body.length.should.be.equals(3)
+        res.body[0]['_count'].should.be.equals(231)
+        res.body[1]['_count'].should.be.equals(268)
+        res.body[2]['_count'].should.be.equals(273)
+
+        return done();
+
+      });
+  })
+
+  it('GET /api/payments/chart?_fields=amount&range=1 should PASS', function (done) {
+
+    //post to an url with data
+    agent.get('/api/payments/chart?_fields=amount&range=1')     //enter url
+      .expect(200)//200 for success 4xx for failure
+      .end(function (err, res) {
+        // Handle /api/v error
+        if (err) {
+          return done(err);
+        }
+
+        res.body.length.should.be.equals(7)
+        res.body[0]['_count'].should.be.equals(45)
+        res.body[6]['_count'].should.be.equals(273)
+
+        return done();
+
+      });
+  })
+
   it('GET /api/offices/1/employees?_groupby=jobTitle&_having=(_count,gt,1) should PASS', function (done) {
 
     //post to an url with data
@@ -1823,8 +1887,6 @@ describe('xmysql : tests', function () {
 
     var err = whereClause.getConditionClause('(a,is,null)~and(b,is,true)~and(c,is,false)')
 
-    //console.log(err.params[1],err);
-
     err.err.should.be.equal(0)
     err.query.should.be.equal('(?? is ?)and(?? is ?)and(?? is ?)')
     //err.params[1].should.be.equal(null)