前端sql条件拼接js工具

因为项目原因，需要前端写sql，所以弄了一套sql条件拼接的js工具

html 复制代码


/*常量
LT : " < ",
LE : " <= ",
GT : " > ",
GE : " >= ",
NE : " != ",
EQ : " = ",
LIKE : " like ",
OR : " or ",
IN : " in ",
*/

let sqlUtil = {
    // 拼接sql
    buildSql : '',

    /*函数*/
    lt: lessThan,
    lte: lessThanOrEqual,
    gt: greaterThan,
    gte: greaterThanOrEqual,
    ne: notEqual,
    eq: equal,
    toLike: sqlLike,
    leftLike:leftLike,
    rightLike:rightLike,
    in: sqlIn,
    notIn: notIn,
    isNull: isNull,
    isNotNull: isNotNull,
    isEmpty: isEmpty,
    isEmptyOrNull: isEmptyOrNull,
    isNotEmpty:isNotEmpty,
    isNotEmptyAndNotNull:isNotEmptyAndNotNull,
    sor: simpleOr,
    toBetween: between,
    notBetween : notBetween,
    sqlOr: sqlOr,
    orderByDesc : orderByDesc,
    orderByAsc: orderByAsc,
    orderBy: orderBy,
    notDelete : notDelete,
    userDefined:userDefined,
    toSql: toSql
};

/**
 * 小于 <
 * sqlUtil.lt("field_name",fieldValue)
 * @param fieldName 字段名
 * @param fieldValue 字段值
 * @param condition 判断条件是否成立
 * @returns {{sqlUtil}} 拼接后的sqlUtil
 */
function lessThan(fieldName,fieldValue,condition = true){
    if(!condition){
        return this;
    }
    if(fieldValue && fieldValue.trim() !== ''){
        sqlUtil.buildSql = sqlUtil.buildSql + "and "+fieldName+" < '"+fieldValue+"' ";
    }
    return this;
}

/**
 * 小于等于 <=
 * sqlUtil.le("field_name",fieldValue)
 * @param fieldName 字段名
 * @param fieldValue 字段值
 * @param condition 判断条件是否成立
 * @returns {{sqlUtil}} 拼接后的sqlUtil
 */
function lessThanOrEqual(fieldName,fieldValue,condition = true){
    if(!condition){
        return this;
    }
    if(fieldValue && fieldValue.trim() !== ''){
        sqlUtil.buildSql = sqlUtil.buildSql + "and "+fieldName+" <= '"+fieldValue+"' ";
    }
    return this;
}

/**
 * 大于 >
 * sqlUtil.gt("field_name",fieldValue)
 * @param fieldName 字段名
 * @param fieldValue 字段值
 * @param condition 判断条件是否成立
 * @returns {{sqlUtil}} 拼接后的sqlUtil
 */
function greaterThan(fieldName,fieldValue,condition = true){
    if(!condition){
        return this;
    }
    if(fieldValue && fieldValue.trim() !== ''){
        sqlUtil.buildSql = sqlUtil.buildSql + "and "+fieldName+" > '"+fieldValue+"' ";
    }
    return this;
}


/**
 * 大于等于 >=
 * sqlUtil.ge("field_name",fieldValue)
 * @param fieldName 字段名
 * @param fieldValue 字段值
 * @param condition 判断条件是否成立
 * @returns {{sqlUtil}} 拼接后的sqlUtil
 */
function greaterThanOrEqual(fieldName,fieldValue,condition = true){
    if(!condition){
        return this;
    }
    if(fieldValue && fieldValue.trim() !== ''){
        sqlUtil.buildSql = sqlUtil.buildSql + "and "+fieldName+" >= '"+fieldValue+"' ";
    }
    return this;
}


/**
 * 不等于 !=
 * sqlUtil.ne("field_name",fieldValue)
 * @param fieldName 字段名
 * @param fieldValue 字段值
 * @param condition 判断条件是否成立
 * @returns {{sqlUtil}} 拼接后的sqlUtil
 */
function notEqual(fieldName,fieldValue,condition = true){
    if(!condition){
        return this;
    }
    if(fieldValue && fieldValue.trim() !== ''){
        sqlUtil.buildSql = sqlUtil.buildSql + "and "+fieldName+" != '"+fieldValue+"' ";
    }
    return this;
}

/**
 * 等于 =
 * sqlUtil.eq("field_name",fieldValue)
 * @param fieldName 字段名
 * @param fieldValue 字段值
 * @param condition 判断条件是否成立
 * @returns {{sqlUtil}} 拼接后的sqlUtil
 */
function equal(fieldName,fieldValue,condition = true){
    if(!condition){
        return this;
    }

    if(!fieldValue){
        return this;
    }

    if(typeof fieldValue === 'string' && fieldValue.trim() === ''){
        return this;
    }

    sqlUtil.buildSql = sqlUtil.buildSql + "and "+fieldName+" = '"+fieldValue+"' ";
    return this;
}

/**
 * 模糊搜索 like
 * sqlUtil.like("field_name",fieldValue)
 * @param fieldName 字段名
 * @param fieldValue 字段值
 * @param condition 判断条件是否成立
 * @returns {{sqlUtil}} 拼接后的sqlUtil
 */
function sqlLike(fieldName,fieldValue,condition = true){
    if(!condition){
        return this;
    }
    if(fieldValue && fieldValue.trim() !== ''){
        fieldValue = fieldValue.replaceAll('%','\\%');
        sqlUtil.buildSql = sqlUtil.buildSql + "and "+fieldName+" like '%"+fieldValue+"%' ";
    }
    return this;
}

/**
 * 模糊搜索 左like
 * sqlUtil.leftLike("field_name",fieldValue)
 * @param fieldName 字段名
 * @param fieldValue 字段值
 * @param condition 判断条件是否成立
 * @returns {{sqlUtil}} 拼接后的sqlUtil
 */
function leftLike(fieldName,fieldValue,condition = true){
    if(!condition){
        return this;
    }
    if(fieldValue && fieldValue.trim() !== ''){
        fieldValue = fieldValue.replaceAll('%','\\%');
        sqlUtil.buildSql = sqlUtil.buildSql + "and "+fieldName+" like '%"+fieldValue+"' ";
    }
    return this;
}



/**
 * 模糊搜索 右like
 * sqlUtil.rightLike("field_name",fieldValue)
 * @param fieldName 字段名
 * @param fieldValue 字段值
 * @param condition 判断条件是否成立
 * @returns {{sqlUtil}} 拼接后的sqlUtil
 */
function rightLike(fieldName,fieldValue,condition = true){
    if(!condition){
        return this;
    }
    if(fieldValue && fieldValue.trim() !== ''){
        fieldValue = fieldValue.replaceAll('%','\\%');
        sqlUtil.buildSql = sqlUtil.buildSql + "and "+fieldName+" like '"+fieldValue+"%' ";
    }
    return this;
}

/**
 * in查询
 * sqlUtil.in("field_name",fieldValueArray)
 * @param fieldName 字段名
 * @param fieldValueArray 字段值数组
 * @param condition 判断条件是否成立
 * @returns {{sqlUtil}} 拼接后的sqlUtil
 */
function sqlIn(fieldName,fieldValueArray = [],condition = true){
    if(!condition){
        return this;
    }
    if (fieldValueArray.length === 0){
        return this;
    }

    sqlUtil.buildSql = sqlUtil.buildSql + "and "+fieldName+" in ( ";
    for (const fieldValue of fieldValueArray) {
        if(typeof fieldValue === "string"){
            sqlUtil.buildSql = sqlUtil.buildSql + "'" + fieldValue + "',";
        }else{
            sqlUtil.buildSql = sqlUtil.buildSql + fieldValue + ",";
        }

    }

    sqlUtil.buildSql = sqlUtil.buildSql.substring(0,sqlUtil.buildSql.length-1) + ") ";
    return this;
}

/**
 * not in查询
 * sqlUtil.notIn("field_name",fieldValueArray)
 * @param fieldName 字段名
 * @param fieldValueArray 字段值数组
 * @param condition 判断条件是否成立
 * @returns {{sqlUtil}} 拼接后的sqlUtil
 */
function notIn(fieldName,fieldValueArray = [],condition = true){
    if(!condition){
        return this;
    }
    if (fieldValueArray.length === 0){
        return this;
    }

    sqlUtil.buildSql = sqlUtil.buildSql + "and "+fieldName+" not in ( ";
    for (const fieldValue of fieldValueArray) {
        sqlUtil.buildSql = sqlUtil.buildSql + fieldValue + " ,";
    }

    sqlUtil.buildSql = sqlUtil.buildSql.substring(0,sqlUtil.buildSql.length-1) + " ) ";
    return this;
}


/**
 * is null
 * sqlUtil.isNull("field_name",fieldValue)
 * @param fieldName 字段名
 * @param fieldValue 字段值
 * @param condition 判断条件是否成立
 * @returns {{sqlUtil}} 拼接后的sqlUtil
 */
function isNull(fieldName,fieldValue,condition = true){
    if(!condition){
        return this;
    }
    if(fieldValue && fieldValue.trim() !== ''){
        sqlUtil.buildSql = sqlUtil.buildSql + "and "+fieldName+" is null '"+fieldValue+"%' ";
    }
    return this;
}


/**
 * is not null
 * sqlUtil.isNotNull("field_name",fieldValue)
 * @param fieldName 字段名
 * @param fieldValue 字段值
 * @param condition 判断条件是否成立
 * @returns {{sqlUtil}} 拼接后的sqlUtil
 */
function isNotNull(fieldName,fieldValue,condition = true){
    if(!condition){
        return this;
    }
    if(fieldValue && fieldValue.trim() !== ''){
        sqlUtil.buildSql = sqlUtil.buildSql + "and "+fieldName+" is not null '"+fieldValue+"%' ";
    }
    return this;
}


/**
 * 是否为空字符
 * sqlUtil.isEmpty("field_name",fieldValue)
 * @param fieldName 字段名
 * @param condition 判断条件是否成立
 * @returns {{sqlUtil}} 拼接后的sqlUtil
 */
function isEmpty(fieldName,condition = true){
    if(!condition){
        return this;
    }
    if(fieldName){
        sqlUtil.buildSql = sqlUtil.buildSql + "and "+fieldName+" = '' ";
    }
    return this;
}

/**
 * 是否为 空字符或null
 * sqlUtil.isEmpty("field_name",fieldValue)
 * @param fieldName 字段名
 * @param condition 判断条件是否成立
 * @returns {{sqlUtil}} 拼接后的sqlUtil
 */
function isEmptyOrNull(fieldName,condition = true){
    if(!condition){
        return this;
    }
    if(fieldName){
        sqlUtil.buildSql = sqlUtil.buildSql + "and ("+fieldName+" = '' or  "+fieldName+" is null)";
    }
    return this;
}

/**
 * 是否为空字符
 * sqlUtil.isNotEmpty("field_name",fieldValue)
 * @param fieldName 字段名
 * @param condition 判断条件是否成立
 * @returns {{sqlUtil}} 拼接后的sqlUtil
 */
function isNotEmpty(fieldName,condition = true){
    if(!condition){
        return this;
    }
    if(fieldName){
        sqlUtil.buildSql = sqlUtil.buildSql + "and "+fieldName+" != '' ";
    }
    return this;
}

/**
 * 是否为空字符
 * sqlUtil.isNotEmpty("field_name",fieldValue)
 * @param fieldName 字段名
 * @param condition 判断条件是否成立
 * @returns {{sqlUtil}} 拼接后的sqlUtil
 */
function isNotEmptyAndNotNull(fieldName,condition = true){
    if(!condition){
        return this;
    }
    if(fieldName){
        sqlUtil.buildSql = sqlUtil.buildSql + "and ("+fieldName+" != '' or  "+fieldName+" is not null)";
    }
    return this;
}

/**
 * between("age", 20, 22);
 * @param fieldName 字段名
 * @param fieldValue1  第一个值
 * @param fieldValue2 第二个值
 * @param condition 判断条件是否成立
 * @returns {{sqlUtil}} 拼接后的sqlUtil
 */

function between(fieldName,fieldValue1,fieldValue2,condition = true){
    if(!condition){
        return this;
    }
    if(!fieldValue1 || !fieldValue2){
        return this;
    }

    if(typeof fieldValue1 === 'string' && typeof fieldValue2  === 'string'){
        //  有可能是日期
        sqlUtil.buildSql = sqlUtil.buildSql + "and '"+fieldName+"' between '"+fieldValue1+"' and '"+fieldValue2+"' ";
    }else{
        sqlUtil.buildSql = sqlUtil.buildSql + "and '"+fieldName+"' between "+fieldValue1+" and "+fieldValue2+" ";
    }

    return this;
}

/**
 * sqlUtil.notBetween("field_name",20,22)
 * notBetween("age", 20, 22);
 * @param fieldName 字段名
 * @param fieldValue1  第一个值
 * @param fieldValue2 第二个值
 * @param condition 判断条件是否成立
 * @returns {{sqlUtil}} 拼接后的sqlUtil
 */

function notBetween(fieldName,fieldValue1,fieldValue2,condition = true){
    if(!condition){
        return this;
    }
    if(fieldName){
        sqlUtil.buildSql = sqlUtil.buildSql + "and '"+fieldName+"' not between "+fieldValue1+" and "+fieldValue2+" ";
    }
    return this;
}

/**
 * sqlUtil.orderByAsc("field_name") || sqlUtil.orderByAsc(["field_name1","field_name2"])
 * "order by id asc"
 * @param fieldName 字段名 || 数组
 * @param condition 判断条件是否成立
 * @returns {{sqlUtil}} 拼接后的sqlUtil
 */
function orderByAsc(fieldName,condition = true){
    if(!condition){
        return this;
    }
    if(typeof fieldName === 'string'){
        sqlUtil.buildSql = sqlUtil.buildSql +" order by "+fieldName+" asc"
    }else{
        sqlUtil.buildSql = sqlUtil.buildSql +" order by ";
        for (const itemName of fieldName) {
            sqlUtil.buildSql = sqlUtil.buildSql + itemName + " asc,";
        }
        sqlUtil.buildSql = sqlUtil.buildSql.substring(0,sqlUtil.buildSql.length-1) + " ";
    }

    return this;
}

/**
 * sqlUtil.orderByDesc("field_name") || sqlUtil.orderByDesc(["field_name1","field_name2"])
 * "order by id desc"
 * @param fieldName 字段名 || 数组
 * @param condition 判断条件是否成立
 * @returns {{sqlUtil}} 拼接后的sqlUtil
 */
function orderByDesc(fieldName,condition = true){
    if(!condition){
        return this;
    }
    if(typeof fieldName === 'string'){
        sqlUtil.buildSql = sqlUtil.buildSql +" order by "+fieldName+" desc"
    }else{
        sqlUtil.buildSql = sqlUtil.buildSql +" order by ";
        for (const itemName of fieldName) {
            sqlUtil.buildSql = sqlUtil.buildSql + itemName + " desc,";
        }
        sqlUtil.buildSql = sqlUtil.buildSql.substring(0,sqlUtil.buildSql.length-1) + " ";
    }

    return this;
}

/**
 * 自定义排序
 * @param fieldList 字段名或数组[{fileName:'',order:''}],order的值为 desc|asc
 * @param condition
 * @returns {orderBy}
 */
function orderBy(fieldList,condition = true){
    if(!condition){
        return this;
    }

    sqlUtil.buildSql = sqlUtil.buildSql +" order by ";
    for (const item of fieldList) {
        sqlUtil.buildSql = sqlUtil.buildSql + item.fileName +" "+item.order +",";
    }
    sqlUtil.buildSql = sqlUtil.buildSql.substring(0,sqlUtil.buildSql.length-1) + " ";

    return this;
}



/**
 * 简单的或条件 or
 * const paramMap =  new Map([
 *   ["field_name1",fieldValue1],
 *   ["field_name2",fieldValue2],
 *   ["field_name3",fieldValue3],
 * ])
 *
 * sqlUtil.sor(paramMap)
 * @param paramMap  参数集
 *
 * @param condition
 * @returns {{sqlUtil}} 拼接后的sqlUtil
 */
function simpleOr(paramMap,condition = true){
    if(!condition){
        return this;
    }
    if(! paramMap){
        return this;
    }

    sqlUtil.buildSql += "and ( ";
    for(let [index,field] of paramMap.entries()){
        sqlUtil.buildSql = sqlUtil.buildSql + field[0]+" = '"+field[1]+"' or ";
    }
    sqlUtil.buildSql = sqlUtil.buildSql.substring(0, sqlUtil.buildSql.length - 4) +  ") ";

    return this;
}


/**
 * 或条件 or
 *
 * sqlUtil.OR(paramMap)
 * @param paramSqlList  sql集
 * @param condition
 * @returns {{sqlUtil}} 拼接后的sqlUtil
 */
function sqlOr(paramSqlList= [],condition = true){
    if(!condition){
        return this;
    }

    if(paramSqlList.length === 0){
        return this;
    }

    sqlUtil.buildSql = sqlUtil.buildSql +" and (";
    for (const paramSql of paramSqlList) {
        sqlUtil.buildSql = sqlUtil.buildSql + " or "
    }
    sqlUtil.buildSql = sqlUtil.buildSql.substring(0,sqlUtil.buildSql.length - 3) + ") "

    return this;
}

/**
 * 查询没有被逻辑删除的
 * @returns {{sqlUtil}} 拼接后的sqlUtil
 */
function notDelete(){
    sqlUtil.buildSql += "and is_delete = '0' "
    return this;
}

/**
 * 自定义sql,
 * @param paramSql  'and {condition}'
 * @param condition  条件
 */
function userDefined(paramSql,condition = true){
    if(!condition){
        return this;
    }
    sqlUtil.buildSql += paramSql;
    return this;

}

/**
 * 获取拼装后的sql
 * @returns {string}
 */
function toSql(){
    let sql = '';
    //判断有没有orderBy
    if(sqlUtil.buildSql.indexOf("order by") != -1){
       let arr = sqlUtil.buildSql.split("order by");
       sql = arr[0] + " and is_delete = '0' "+"order by"+arr[1];
    }else{
        sql =  sqlUtil.notDelete()["buildSql"];
    }
    // sqlUtil.notDelete().buildSql

    sqlUtil.buildSql = '';
    console.log("sql:"+sql);
    return sql;
}

export default sqlUtil;

或许某些场景，例如用户自定义条件的场景才用得到吧？这篇文章如能提供到帮助，方便的话请在评论下留言，我也想知道还能用到什么地方。

使用方式参考如下（使用userDefined方法可以利用sql函数，并进行条件拼接）：

html 复制代码

return sqlUtil
          .toLike("discussion_title",searchParam.discussionTitle)
          .eq("division_code",searchParam.divisionCode)
          .eq("party_grid_deliberation_id",searchParam.partyGridDeliberationId)
          .userDefined(" and (DATE_FORMAT(discussion_time_start, '%Y-%m') = '"+this.searchParam.discussionYearMonth+"' or DATE_FORMAT(discussion_time_end, '%Y-%m') = '"+this.searchParam.discussionYearMonth+"') ",this.searchParam.discussionYearMonth)
          .orderByDesc("discussion_time_start")
          .toSql();

另外进阶版，可以结合jq的extend，进一步封装，像后端开发那样，把业务代码写到前端来。如图：

fwptPost(表名，提交的json对象)。

这样做当然是有缺陷，需要解决事务一致性的问题，要考虑如何联表，要考虑性能。