1 // Translate for example "-name" to [ [ 'name', 'DESC' ], [ 'id', 'ASC' ] ]
2 import { Sequelize } from 'sequelize-typescript'
4 type SortType = { sortModel: any, sortValue: string }
6 function getSort (value: string, lastSort: string[] = [ 'id', 'ASC' ]) {
8 let direction: 'ASC' | 'DESC'
10 if (value.substring(0, 1) === '-') {
12 field = value.substring(1)
19 if (field.toLowerCase() === 'match') field = Sequelize.col('similarity')
21 return [ [ field, direction ], lastSort ]
24 function getSortOnModel (model: any, value: string, lastSort: string[] = [ 'id', 'ASC' ]) {
25 let [ firstSort ] = getSort(value)
27 if (model) return [ [ model, firstSort[0], firstSort[1] ], lastSort ]
28 return [ firstSort, lastSort ]
31 function throwIfNotValid (value: any, validator: (value: any) => boolean, fieldName = 'value') {
32 if (validator(value) === false) {
33 throw new Error(`"${value}" is not a valid ${fieldName}.`)
37 function buildTrigramSearchIndex (indexName: string, attribute: string) {
40 fields: [ Sequelize.literal('lower(immutable_unaccent(' + attribute + '))') as any ],
42 operator: 'gin_trgm_ops'
46 function createSimilarityAttribute (col: string, value: string) {
50 searchTrigramNormalizeCol(col),
52 searchTrigramNormalizeValue(value)
56 // ---------------------------------------------------------------------------
62 createSimilarityAttribute,
64 buildTrigramSearchIndex
67 // ---------------------------------------------------------------------------
69 function searchTrigramNormalizeValue (value: string) {
70 return Sequelize.fn('lower', Sequelize.fn('immutable_unaccent', value))
73 function searchTrigramNormalizeCol (col: string) {
74 return Sequelize.fn('lower', Sequelize.fn('immutable_unaccent', Sequelize.col(col)))