// Translate for example "-name" to [ [ 'name', 'DESC' ], [ 'id', 'ASC' ] ]
+import { Sequelize } from 'sequelize-typescript'
+
function getSort (value: string, lastSort: string[] = [ 'id', 'ASC' ]) {
- let field: string
+ let field: any
let direction: 'ASC' | 'DESC'
if (value.substring(0, 1) === '-') {
field = value
}
+ // Alias
+ if (field.toLowerCase() === 'match') field = Sequelize.col('similarity')
+
return [ [ field, direction ], lastSort ]
}
}
}
+function buildTrigramSearchIndex (indexName: string, attribute: string) {
+ return {
+ name: indexName,
+ fields: [ Sequelize.literal('lower(immutable_unaccent(' + attribute + '))') as any ],
+ using: 'gin',
+ operator: 'gin_trgm_ops'
+ }
+}
+
+function createSimilarityAttribute (col: string, value: string) {
+ return Sequelize.fn(
+ 'similarity',
+
+ searchTrigramNormalizeCol(col),
+
+ searchTrigramNormalizeValue(value)
+ )
+}
+
// ---------------------------------------------------------------------------
export {
getSort,
getSortOnModel,
- throwIfNotValid
+ createSimilarityAttribute,
+ throwIfNotValid,
+ buildTrigramSearchIndex
+}
+
+// ---------------------------------------------------------------------------
+
+function searchTrigramNormalizeValue (value: string) {
+ return Sequelize.fn('lower', Sequelize.fn('immutable_unaccent', value))
+}
+
+function searchTrigramNormalizeCol (col: string) {
+ return Sequelize.fn('lower', Sequelize.fn('immutable_unaccent', Sequelize.col(col)))
}