Initial commit

index.js

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+
+var simpleOperators = [
+  'LIKE',
+  '>',
+  '<',
+];
+
+var functionOperators = [
+  'BETWEEN',
+  'IN'
+];
+
+var functionOperatorMap = {
+  BETWEEN: 'whereBetween',
+  IN: 'whereIn'
+};
+
+
+
+function addCondition( q, field, val ){
+  var conditionFn, conditionName;
+  if( !Array.isArray(val)){
+    return q.where( field, val );
+  }
+  conditionName = val[0];
+  if( simpleOperators.indexOf( conditionName ) !== -1 ){
+    return q.where.apply(q, [field].concat(val) );
+  }
+  if( functionOperators.indexOf(conditionName) !== -1 ){
+    return q[functionOperatorMap[conditionName] ]( field, val.slice(1) );
+  }
+}
+
+function getWhereCondition( cond ){
+  if( Array.isArray(cond) ){
+    return function(){
+      cond.forEach( function(v){
+        this.orWhere( getWhereCondition(v) );
+      }, this );
+    };
+  } else {
+    return function(){
+      var field;
+      for( field in cond ){
+        addCondition( this, field, cond[field] );
+      }
+    };
+  }
+}
+
+
+module.exports = getWhereCondition;

package.json

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+{
+  "name": "knex-json-query",
+  "version": "0.0.1",
+  "description": "A high-level utility which will will generate Knex query from a single JSON object.",
+  "main": "index.js",
+  "scripts": {
+    "test": "mocha -R spec"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/harish2704/knex-json-query.git"
+  },
+  "keywords": [
+    "knex",
+    "sql",
+    "json-query"
+  ],
+  "author": "Harish.K <harish2704@gmail.com>",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/harish2704/knex-json-query/issues"
+  },
+  "homepage": "https://github.com/harish2704/knex-json-query#readme",
+  "devDependencies": {
+    "knex": "^0.12.6"
+  }
+}

test.js

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+/* global describe, it  */
+var assert = require('assert');
+var knex = require('knex')({});
+var knexJsonQuery = require('./');
+
+
+var conditions= [
+  /* -----------Tests for and conditoins---------- */
+  {
+    name: 'handle simple and conditions',
+    input:{ f1: 10, f2: 20, f3: 30 },
+    output: 'select * where ("f1" = 10 and "f2" = 20 and "f3" = 30)'
+  },
+  {
+    name: 'handle simple and condition with like statement',
+    input:{ f1: ['LIKE', 20], f2: 20, f3: 30 },
+    output: 'select * where ("f1" LIKE 20 and "f2" = 20 and "f3" = 30)'
+  },
+  {
+    name: 'handle simple and condition with between statement',
+    input:{ f1: ['BETWEEN', 50, 60 ], f2: 20, f3: 30 },
+    output: 'select * where ("f1" between 50 and 60 and "f2" = 20 and "f3" = 30)'
+  },
+  {
+    name: 'handle simple and condition with in statement',
+    input:{ f1: ['IN', [ 50, 60 ] ], f2: 20, f3: 30 },
+    output: 'select * where ("f1" in (50, 60) and "f2" = 20 and "f3" = 30)'
+  },
+  /* -----------Tests for or conditoins---------- */
+  {
+    name: 'handle simple or condition',
+    input:[ { f1: 10 }, { f2: 20 }, { f3: 30 } ],
+    output: 'select * where (("f1" = 10) or ("f2" = 20) or ("f3" = 30))'
+  },
+  {
+    name: 'handle simple or condition with like statement',
+    input:[ { f1: ['LIKE',10] }, { f2: 20 }, { f3: 30 } ],
+    output: 'select * where (("f1" LIKE 10) or ("f2" = 20) or ("f3" = 30))'
+  },
+  {
+    name: 'handle simple or condition with between statement',
+    input:[ { f1: ['BETWEEN',50, 60] }, { f2: 20 }, { f3: 30 } ],
+    output: 'select * where (("f1" between 50 and 60) or ("f2" = 20) or ("f3" = 30))'
+  },
+  {
+    name: 'handle simple or condition with in statement',
+    input:[ { f1: ['IN',[ 50, 60 ]] }, { f2: 20 }, { f3: 30 } ],
+    output: 'select * where (("f1" in (50, 60)) or ("f2" = 20) or ("f3" = 30))'
+  },
+];
+
+
+describe('SQL query generation from json query', function(){
+  conditions.forEach(function(v){
+    it( 'should ' + v.name , function(){
+      var expectedOut = knex.where( knexJsonQuery(v.input) ) + '';
+      assert.equal( v.output, expectedOut );
+    });
+  });
+});
+