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68 lines
2.3 KiB
JavaScript
68 lines
2.3 KiB
JavaScript
"use strict";
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const matchValue = require("match-value");
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const operations = require("../../operations");
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const internalOperations = require("../../internal-operations");
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const NoChange = require("../util/no-change");
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const ConsumeNode = require("../util/consume-node");
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/*
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Translate index modifiers on a single field into a top-level (non-composite) index element
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{ type: "index"|"removeIndex", indexType, isComposite: true|false, field|fields}
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*/
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// MARKER: Filter out ConsumeNode from result (doublecheck that their presence doesn't signify a bug!), figure out autogeneration for index names, improve error for localColumn to explicitly say "don't provide a column name" (via partial match followed by error, eg. forbidden + wrapError)
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function handleCollection(node, { registerStateHandler, defer }) {
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let createNode = matchValue.literal(node.type, {
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createCollectionCommand: operations.createCollection,
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changeCollectionCommand: operations.changeCollection
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});
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let indexNodes = [];
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registerStateHandler("encounteredLocalIndex", (item) => {
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// FIXME: Make named index
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// FIXME: Default name generation for indexes
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indexNodes.push(item);
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});
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return defer(() => {
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if (indexNodes.length > 0) {
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let indexesObject = operations.indexes(indexNodes.map(({ node, key }) => {
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// FIXME: Why is it allowed to call operations.index with the same arguments? That should be disallowed.
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return internalOperations._index({
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indexType: node.indexType,
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field: operations.field(key),
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clauses: node.clauses
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});
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}));
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return createNode(node.name, node.operations.concat([ indexesObject ]));
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} else {
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return NoChange;
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}
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});
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}
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module.exports = {
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name: "move-out-indexes",
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category: [ "normalization" ],
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visitors: {
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localIndex: (node, { setState, findNearestStep }) => {
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let { key } = findNearestStep("$object");
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setState("encounteredLocalIndex", { node, key });
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return ConsumeNode;
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},
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createCollectionCommand: handleCollection,
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changeCollectionCommand: handleCollection
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// MARKER: Move indexes from column definitions to table index definition, with auto-generated name; may need some way to select "only within node of type X" (where X = fields)
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// IDEA: propertyPath and typePath arguments, for the visitor to determine whether it is appearing in the correct place (otherwise NoChange)
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}
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};
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