#345 - Filter items by tag

client/core/src/components/rest-model/crud-model.js

@@ -27,8 +27,7 @@ export default class CrudModel extends ModelProxy {
             where: mergeWhere(this.link, this.where),
             include: this.include,
             order: this.order,
-            limit: this.limit,
+            limit: this.limit
-            userData: this.userData
         };
 
         let filter = this.filter;
@@ -153,7 +152,7 @@ ngModule.component('vnCrudModel', {
         order: '@?',
         limit: '<?',
         filter: '<?',
-        userData: '<?',
+        userParams: '<?',
         primaryKey: '@?',
         autoLoad: '<?'
     }
@@ -232,8 +231,6 @@ function mergeFilters(src, dst) {
         res.order = src.order;
     if (src.limit)
         res.limit = src.limit;
-    if (src.userData)
-        res.userData = src.userData;
 
     return res;
 }

client/item/src/index/index.html

@@ -1,8 +1,8 @@
 <vn-crud-model
     vn-id="model"
     url="/item/api/Items/filter"
-    filter="::$ctrl.filter"
     limit="8"
+    order="name ASC"
     data="items"
     auto-load="false">
 </vn-crud-model>

client/item/src/index/index.js

@@ -8,22 +8,6 @@ class Controller {
         this.$state = $state;
         this.$ = $scope;
         this.itemSelected = null;
-
-        this.filter = {
-            include: [
-                {
-                    relation: 'itemType',
-                    scope: {
-                        fields: ['name', 'workerFk'],
-                        include: {
-                            relation: 'worker',
-                            fields: ['firstName', 'name']
-                        }
-                    }
-                }
-            ],
-            order: 'name ASC'
-        };
     }
 
     exprBuilder(param, value) {
@@ -31,10 +15,10 @@ class Controller {
         case 'search':
             return /^\d+$/.test(value)
                 ? {id: value}
-                : {name: {regexp: value}};
+                : {name: {like: `%${value}%`}};
         case 'name':
         case 'description':
-            return {[param]: {regexp: value}};
+            return {[param]: {like: `%${value}%`}};
         case 'id':
         case 'typeFk':
             return {[param]: value};

client/item/src/index/product.html

@@ -21,10 +21,10 @@
                 value="{{::$ctrl.item.size}}">
             </vn-label-value>
             <vn-label-value label="Type" 
-                value="{{::$ctrl.item.itemType.name}}">
+                value="{{::$ctrl.item.type}}">
             </vn-label-value>
             <vn-label-value label="Buyer" 
-                value="{{::$ctrl.item.itemType.worker.firstName}} {{::$ctrl.item.itemType.worker.name}}">
+                value="{{::$ctrl.item.firstName}} {{::$ctrl.item.worker}}">
             </vn-label-value>
         </vn-one>
         <vn-horizontal class="buttons">

services/loopback/common/methods/item/filter.js

@@ -1,3 +1,6 @@
+
+const ParameterizedSQL = require('loopback-connector').ParameterizedSQL;
+
 module.exports = Self => {
     Self.remoteMethod('filter', {
         description: 'Find all instances of the model matched by filter from the data source.',
@@ -6,7 +9,7 @@ module.exports = Self => {
             {
                 arg: 'filter',
                 type: 'Object',
-                description: 'Filter defining fields, where, include, order, offset, and limit - must be a JSON-encoded string ({"something":"value"})',
+                description: 'Filter defining where, order, offset, and limit - must be a JSON-encoded string',
                 http: {source: 'query'}
             }, {
                 arg: 'tags',
@@ -26,7 +29,29 @@ module.exports = Self => {
     });
 
     Self.filter = async(filter, tags) => {
-        console.log(tags);
+        let stmt = new ParameterizedSQL(
-        return await Self.find(filter);
+            `SELECT i.id, i.image, i.name, i.description, i.size,
+                    t.name type, w.firstName, w.name worker
+                FROM item i
+                    JOIN itemType t ON t.id = i.typeFk
+                    JOIN worker w ON w.id = t.workerFk`
+        );
+
+        if (tags) {
+            let i = 1;
+            for (let tag of tags) {
+                if (tag.value == null) continue;
+                let tAlias = `it${i++}`;
+                stmt.merge({
+                    sql: `JOIN itemTag ${tAlias} ON ${tAlias}.itemFk = i.id
+                        AND ${tAlias}.tagFk = ?
+                        AND ${tAlias}.value = ?`,
+                    params: [tag.tagFk, tag.value]
+                });
+            }
+        }
+
+        stmt.merge(Self.buildSuffix(filter, 'i'));
+        return Self.rawStmt(stmt);
     };
 };

services/loopback/common/methods/vn-model/rawSql.js

@@ -1,15 +0,0 @@
-module.exports = function(Self) {
-    Self.rawSql = function(query, params, cb) {
-        var connector = this.dataSource.connector;
-        return new Promise(function(resolve, reject) {
-            connector.execute(query, params, function(error, response) {
-                if (cb)
-                    cb(error, response);
-                if (error)
-                    reject(error);
-                else
-                    resolve(response);
-            });
-        });
-    };
-};

services/loopback/common/models/vn-model.js

@@ -1,3 +1,6 @@
+
+const ParameterizedSQL = require('loopback-connector').ParameterizedSQL;
+
 module.exports = function(Self) {
     Self.setup = function() {
         Self.super_.setup.call(this);
@@ -162,7 +165,89 @@ module.exports = function(Self) {
         };
     };
 
-    require('../methods/vn-model/rawSql')(Self);
+    Self.rawSql = function(query, params, cb) {
+        var connector = this.dataSource.connector;
+        return new Promise(function(resolve, reject) {
+            connector.execute(query, params, function(error, response) {
+                if (cb)
+                    cb(error, response);
+                if (error)
+                    reject(error);
+                else
+                    resolve(response);
+            });
+        });
+    };
+
+    Self.rawStmt = function(stmt) {
+        return this.rawSql(stmt.sql, stmt.params);
+    };
+
+    Self.escapeName = function(name) {
+        return this.dataSource.connector.escapeName(name);
+    };
+
+    Self.buildWhere = function(filter, tableAlias) {
+        let connector = this.dataSource.connector;
+        let wrappedConnector = Object.create(connector);
+        wrappedConnector.columnEscaped = function(model, property) {
+            let sql = tableAlias
+                ? connector.escapeName(tableAlias) + '.'
+                : '';
+            return sql + connector.columnEscaped(model, property);
+        };
+
+        return wrappedConnector.buildWhere(this.modelName, filter.where);
+    };
+
+    Self.buildLimit = function(filter) {
+        let sql = new ParameterizedSQL('');
+        this.dataSource.connector.applyPagination(this.modelName, sql, filter);
+        return sql;
+    };
+
+    Self.buildOrderBy = function(filter) {
+        let order = filter.order;
+
+        if (!order)
+            return '';
+        if (typeof order === 'string')
+            order = [order];
+
+        let clauses = [];
+
+        for (let clause of order) {
+            let sqlOrder = '';
+            let t = clause.split(/[\s,]+/);
+            let names = t[0].split('.');
+
+            if (names.length > 1)
+                sqlOrder += this.escapeName(names[0]) + '.';
+            sqlOrder += this.escapeName(names[names.length - 1]);
+
+            if (t.length > 1)
+                sqlOrder += ' ' + (t[1].toUpperCase() == 'ASC' ? 'ASC' : 'DESC');
+
+            clauses.push(sqlOrder);
+        }
+
+        return `ORDER BY ${clauses.join(', ')}`;
+    };
+
+    Self.buildPagination = function(filter) {
+        return ParameterizedSQL.join([
+            this.buildOrderBy(filter),
+            this.buildLimit(filter)
+        ]);
+    };
+
+    Self.buildSuffix = function(filter, tableAlias) {
+        return ParameterizedSQL.join([
+            this.buildWhere(filter, tableAlias),
+            this.buildPagination(filter)
+        ]);
+    };
+
     require('../methods/vn-model/installMethod')(Self);
     require('../methods/vn-model/validateBinded')(Self);
 };