@directus/api/dist/database/run-ast/utils/get-column-pre-processor.js

Directus is a real-time API and App dashboard for managing SQL database content

import { applyCaseWhen } from "./apply-case-when.js";
import { getColumn } from "./get-column.js";
import { joinFilterWithCases } from "../lib/apply-query/join-filter-with-cases.js";
import { parseFilterKey } from "../../../utils/parse-filter-key.js";
import { getHelpers } from "../../helpers/index.js";
import { getNodeAlias } from "./get-field-alias.js";

//#region src/database/run-ast/utils/get-column-pre-processor.ts
function getColumnPreprocessor(knex, schema, table, cases, permissions, aliasMap, permissionsOnly) {
	const helpers = getHelpers(knex);
	return function(fieldNode, options) {
		const hasWhenCase = fieldNode.whenCase && fieldNode.whenCase.length > 0;
		const noAlias = options?.noAlias || hasWhenCase;
		const alias = getNodeAlias(fieldNode);
		const rawColumnAlias = noAlias ? false : alias;
		let field;
		if (fieldNode.type === "field" || fieldNode.type === "functionField") {
			const { fieldName } = parseFilterKey(fieldNode.name);
			field = schema.collections[table].fields[fieldName];
		} else field = schema.collections[fieldNode.relation.collection].fields[fieldNode.relation.field];
		let column;
		if (permissionsOnly) if (noAlias) column = knex.raw(1);
		else column = knex.raw("1 as ??", [alias]);
		else if (field?.type?.startsWith("geometry")) column = helpers.st.asText(table, field.field, rawColumnAlias);
		else if (fieldNode.type === "functionField") column = getColumn(knex, table, fieldNode.name, rawColumnAlias, schema, {
			query: {
				...fieldNode.query,
				filter: joinFilterWithCases(fieldNode.query.filter, fieldNode.cases)
			},
			permissions,
			cases: fieldNode.cases
		});
		else column = getColumn(knex, table, fieldNode.name, rawColumnAlias, schema);
		if (hasWhenCase) {
			const columnCases = [];
			for (const index of fieldNode.whenCase) columnCases.push(cases[index]);
			column = applyCaseWhen({
				column,
				columnCases,
				aliasMap,
				cases,
				table,
				alias,
				permissions
			}, {
				knex,
				schema
			});
		}
		return column;
	};
}

//#endregion
export { getColumnPreprocessor };