private DapperSqlSegment GenerateCountSql(QueryFilter filter)
{
var sql = new DapperSqlSegment();
var whereSeg = Context.Runtime.SqlGenerator.GenerateFilter <T>(filter, sql.Parameters);
sql.Sql = string.IsNullOrWhiteSpace(whereSeg) ? $"SELECT COUNT(*) FROM {this.Context.Runtime.DelimitIdentifier(typeof(T), this._metadata.TableName)}"
: $"SELECT COUNT(*) FROM {this.Context.Runtime.DelimitIdentifier(typeof(T), this._metadata.TableName)} WHERE {whereSeg}";
return(sql);
}
private DapperSqlSegment GenerateQuerySql(QueryFilter filter)
{
var sql = new DapperSqlSegment();
var segments = Context.Runtime.GetCrudSegments(this.EntityType);
sql.Sql = segments.SelectSql;
var whereSeg = Context.Runtime.SqlGenerator.GenerateFilter <T>(filter, sql.Parameters);
if (string.IsNullOrWhiteSpace(whereSeg))
{
return(sql);
}
sql.Sql = $"{sql.Sql} WHERE {whereSeg}";
return(sql);
}
private DapperSqlSegment GenerateQueryInSql(string field, IEnumerable <Object> values)
{
var sql = new DapperSqlSegment();
var segments = Context.Runtime.GetCrudSegments(this.EntityType);
sql.Sql = segments.SelectSql;
var inSeg = Context.Runtime.SqlGenerator.GenerateInClause <T>(field, values, sql.Parameters);
if (string.IsNullOrWhiteSpace(inSeg))
{
return(sql);
}
sql.Sql = $"{sql.Sql} WHERE {inSeg}";
return(sql);
}
private DapperSqlSegment GeneratePaginationSql(int pageIndex, int pageSize, QueryFilter filter, SortOptions options)
{
DapperSqlSegment segment = new DapperSqlSegment();
options = options ?? new SortOptions(this._metadata.Fields.First(f => f.IsKey).Name);
var segments = Context.Runtime.GetCrudSegments(this.EntityType);
string select = segments.SelectSql;
string where = filter != null?Context.Runtime.SqlGenerator.GenerateFilter <T>(filter, segment.Parameters) : null;
string order = Context.Runtime.SqlGenerator.GenerateOrderBy <T>(options);
segment.Sql = Context.Runtime.GetDataSource(typeof(T)).DatabaseProvider.BuildPaginationTSql(pageIndex, pageSize, select, order, where);
return(segment);
}
private DapperSqlSegment GenerateUpdateSql(QueryFilter filter, IEnumerable <KeyValuePair <String, Object> > fieldsToUpdate)
{
var segment = new DapperSqlSegment();
if (!fieldsToUpdate.Any())
{
throw new ArgumentException($"{typeof(IRepository<>).FullName}.{nameof(Update)} 方法的 {nameof(fieldsToUpdate)} 参数不可为 null 或空字典，如更新整个实体，考虑使用不包含 {nameof(fieldsToUpdate)} 参数的 {nameof(Update)} 重载方法。");
}
string tableName = Context.Runtime.GetMetadata(this.EntityType).TableName;
string sets = this.Context.Runtime.SqlGenerator.GenerateSetSegments <T>(fieldsToUpdate, segment.Parameters);
string where = this.Context.Runtime.SqlGenerator.GenerateFilter <T>(filter, segment.Parameters);
if (string.IsNullOrWhiteSpace(where))
{
throw new NotSupportedException("不支持没有where条件的UPDATE语句");
}
segment.Sql = $"UPDATE {this.Context.Runtime.DelimitIdentifier(typeof(T), tableName)} SET {sets} WHERE {where}";
return(segment);
}
