Question

我有select个查询，我想添加filter和search值以选择查询。用户可以单独进行搜索，也可以一起进行过滤。以下是场景：

仅应用搜索（成功）时

select name, id from master.contact where name ilike 'sal%' or name ilike 'man%';

当我仅应用第一个过滤器（成功）

select name, id from master.contact where isActive=true;

同时应用两个过滤器（成功）

select name, id from master.contact where isActive=true and pan='abcd';

当我仅应用第二个过滤器（失败）

select name, id from master.contact and pan='abcd';

当我应用搜索并同时使用两个过滤器时（失败）

select * from master.contact where name ilike 'sal%' or name ilike 'man%' where master.contact.is_active = true and pan='abcd';

当我应用搜索和第一个过滤器（失败）

select * from master.contact where name ilike 'sal%' or name ilike 'man%' where master.contact.is_active = true;

nodejs

const query = {
    text: `
      select master.contact.id,
      master.contact.name
      from
      master.contact
       `
  };
  if (input.search) {
    query.text += ` where
    (master.contact.pan ILIKE '${input.search}%' or master.contact.ira ILIKE '${input.search}%')`;
  }

  if (input.filters) {
    const {
      isActive,
      pan
    } = input.filters;
    if (isActive !== undefined) {
      query.text += ` where master.contact.isActive = ${isActive}`;
    }

    if (pan) {
      query.text += `and master.contact.pan = ${pan}`;
    }

Answer 1

如何在数组中收集条件，然后将其加入并附加，如下所示：

const query = {
    text: `
      select master.contact.id,
      master.contact.name
      from
      master.contact
       `
  };

// Create an array to store any criteria
var where = [];

  if (input.search) {
    where.push(`(master.contact.pan ILIKE '${input.search}%' or master.contact.ira ILIKE '${input.search}%')`);
  }

  if (input.filters) {
    const {
      isActive,
      pan
    } = input.filters;
    if (isActive !== undefined) {
      where.push(`master.contact.isActive = ${isActive}`);
    }

    if (pan) {
      where.push(`master.contact.pan = ${pan}`);
    }

// If criteria were added, append to query text
if (where.length > 0) {
   query.text += ' where ' + where.join(' and ');
}

在nodejs中进行postgres条件查询

1 个答案: