Dynamic PHP query builder with EasyQuery

Dynamic PHP query builder with EasyQuery

Localization of query builder's UI

In this article, you can find two methods of localization of EasyQuery components

Building dynamic queries with EasyQuery and Entity Framework

Here we describe how EasyQuery helps to implement a query building UI for creating custom, dynamic queries in .NET projects which use Entity Framework (6.x)

Dynamically populate lists by information from other conditions — WebForms

A code snippet which demonstrates how to execute this task

Microsoft.AspNetCore.Builder namespace

Microsoft.AspNetCore.Builder namespace

Building data model dynamically by DB meta-information

It's easier to fill your model right in the code directly from your database, using meta-information

Using parameters in query conditions

This article explains how to work with parameterized conditions.

Query with OR operators

In this article, you will learn how to build queries that contain both AND and OR operators.

Query with a subquery

How to build queries with subqueries using EasyQuery.

Building data model dynamically by information from a DataTable

Example of how to build data model by certain information from DataTable

Creating data model dynamically with code

-Data Model- object is an essential part of EasyQuery framework. However, sometimes you need to add some entities, entity attributes or operators to the existing model or to fill it from scratch using DB metadata information got from another source. In these cases, you can use EasyQuery API to build the model dynamically. Finally, we add entities and entity attributes. Here is an example of creatin a small data model: two tables (Customers and Orders) with one link between them, 2 entities (Customer and Order correpondingly) and a few attributes in each entity.

Dynamically populate value lists by information from other conditions

Suppose we have a database with Customer entity which has Country and City attributes. For both these attributes we define the value editors which return the lists of available values (countries and cities correspondingly). Now let's imagine the user adds a condition with the Country attribute e.g. Hera the steps needed to implement such a functionality: Define a value editor for the City attribute as SQL LIST with Cities.@{{Customer.Country}} list name (here Customer.Country is the ID of the Country attribute in the Customer entity). Let's name it "CitesSqlValueList") and then in a value list resolver modify its SQL according the currently selected country and get the list of values using GetValueListAsync method of EasyQueryManager class: What's happening here.

Create a query with sub-query by code

Example with code

Common SQL queries

Dynamic populating of value lists in WinForms or WPF editions

Example of how to solve this problem

Query.Error class

Query exception class.

Building data model dynamically using code (version 3.x)

Here you can find all steps you need to perform

Query class

Represents internal query structure.

Query with table joins

An example of query which require to define a table join(s) in case of using SQL. It's much more simple with EasyQuery.