@dpkit/table
Version:
Data Package implementation in TypeScript.
157 lines • 21.8 kB
JavaScript
import { col, lit } from "nodejs-polars";
import { matchField } from "../field/index.js";
import { validateField } from "../field/index.js";
import { validateRows } from "../row/index.js";
import { getPolarsSchema } from "../schema/index.js";
import { normalizeFields } from "./normalize.js";
export async function validateTable(table, options) {
const { schema, sampleRows = 100, invalidRowsLimit = 100 } = options ?? {};
const errors = [];
if (schema) {
const sample = await table.head(sampleRows).collect();
const polarsSchema = getPolarsSchema(sample.schema);
const matchErrors = validateFieldsMatch({ schema, polarsSchema });
errors.push(...matchErrors);
const fieldErrors = await validateFields(table, schema, polarsSchema, invalidRowsLimit);
errors.push(...fieldErrors);
}
return { errors, valid: !errors.length };
}
function validateFieldsMatch(props) {
const { schema, polarsSchema } = props;
const errors = [];
const fieldsMatch = schema.fieldsMatch ?? "exact";
const fields = schema.fields;
const polarsFields = polarsSchema.fields;
const names = fields.map(field => field.name);
const polarsNames = polarsFields.map(field => field.name);
const requiredNames = fields
.filter(field => field.constraints?.required)
.map(field => field.name);
const extraFields = polarsFields.length - fields.length;
const missingFields = fields.length - polarsFields.length;
const extraNames = arrayDiff(polarsNames, names);
const missingNames = arrayDiff(names, polarsNames);
const missingRequiredNames = arrayDiff(requiredNames, polarsNames);
if (fieldsMatch === "exact") {
if (extraFields > 0) {
errors.push({
type: "fields/extra",
fieldNames: extraNames,
});
}
if (missingFields > 0) {
errors.push({
type: "fields/missing",
fieldNames: missingNames,
});
}
}
if (fieldsMatch === "equal") {
if (extraNames.length > 0) {
errors.push({
type: "fields/extra",
fieldNames: extraNames,
});
}
if (missingRequiredNames.length > 0) {
errors.push({
type: "fields/missing",
fieldNames: missingRequiredNames,
});
}
}
if (fieldsMatch === "subset") {
if (missingRequiredNames.length > 0) {
errors.push({
type: "fields/missing",
fieldNames: missingRequiredNames,
});
}
}
if (fieldsMatch === "superset") {
if (extraNames.length > 0) {
errors.push({
type: "fields/extra",
fieldNames: extraNames,
});
}
}
if (fieldsMatch === "partial") {
if (missingNames.length === fields.length) {
errors.push({
type: "fields/missing",
fieldNames: missingNames,
});
}
}
return errors;
}
async function validateFields(table, schema, polarsSchema, invalidRowsLimit) {
const errors = [];
const targetNames = [];
const sources = Object.entries(normalizeFields(schema, polarsSchema, { dontParse: true })).map(([name, expr]) => {
return expr.alias(`source:${name}`);
});
const targets = Object.entries(normalizeFields(schema, polarsSchema, { dontParse: false })).map(([name, expr]) => {
const targetName = `target:${name}`;
targetNames.push(targetName);
return expr.alias(targetName);
});
let errorTable = table
.withRowCount()
.select(col("row_nr").add(1), lit(false).alias("error"), ...sources, ...targets);
for (const [index, field] of schema.fields.entries()) {
const polarsField = matchField(index, field, schema, polarsSchema);
if (polarsField) {
const fieldResult = validateField(field, { errorTable, polarsField });
errorTable = fieldResult.errorTable;
errors.push(...fieldResult.errors);
}
}
const rowsResult = validateRows(schema, errorTable);
errorTable = rowsResult.errorTable;
errors.push(...rowsResult.errors);
const errorFrame = await errorTable
.filter(col("error").eq(true))
.head(invalidRowsLimit)
.drop(targetNames)
.collect();
for (const record of errorFrame.toRecords()) {
const typeErrorInFields = [];
for (const [key, value] of Object.entries(record)) {
const [kind, type, name] = key.split(":");
if (kind === "error" && value === true && type && name) {
const rowNumber = record.row_nr;
// Cell-level errors
if (type.startsWith("cell/")) {
if (!typeErrorInFields.includes(name)) {
errors.push({
rowNumber,
type: type,
fieldName: name,
cell: (record[`source:${name}`] ?? "").toString(),
});
}
// Type error is a terminating error for a cell
if (type === "cell/type") {
typeErrorInFields.push(name);
}
}
// Row-level errors
if (type.startsWith("row/")) {
errors.push({
rowNumber,
type: type,
fieldNames: name.split(","),
});
}
}
}
}
return errors;
}
function arrayDiff(a, b) {
return a.filter(x => !b.includes(x));
}
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type { Schema } from \"@dpkit/core\"\nimport { col, lit } from \"nodejs-polars\"\nimport type { TableError } from \"../error/index.ts\"\nimport { matchField } from \"../field/index.ts\"\nimport { validateField } from \"../field/index.ts\"\nimport { validateRows } from \"../row/index.ts\"\nimport { getPolarsSchema } from \"../schema/index.ts\"\nimport type { PolarsSchema } from \"../schema/index.ts\"\nimport type { Table } from \"./Table.ts\"\nimport { normalizeFields } from \"./normalize.ts\"\n\nexport async function validateTable(\n  table: Table,\n  options?: {\n    schema?: Schema\n    sampleRows?: number\n    invalidRowsLimit?: number\n  },\n) {\n  const { schema, sampleRows = 100, invalidRowsLimit = 100 } = options ?? {}\n  const errors: TableError[] = []\n\n  if (schema) {\n    const sample = await table.head(sampleRows).collect()\n    const polarsSchema = getPolarsSchema(sample.schema)\n\n    const matchErrors = validateFieldsMatch({ schema, polarsSchema })\n    errors.push(...matchErrors)\n\n    const fieldErrors = await validateFields(\n      table,\n      schema,\n      polarsSchema,\n      invalidRowsLimit,\n    )\n    errors.push(...fieldErrors)\n  }\n\n  return { errors, valid: !errors.length }\n}\n\nfunction validateFieldsMatch(props: {\n  schema: Schema\n  polarsSchema: PolarsSchema\n}) {\n  const { schema, polarsSchema } = props\n\n  const errors: TableError[] = []\n  const fieldsMatch = schema.fieldsMatch ?? \"exact\"\n\n  const fields = schema.fields\n  const polarsFields = polarsSchema.fields\n\n  const names = fields.map(field => field.name)\n  const polarsNames = polarsFields.map(field => field.name)\n\n  const requiredNames = fields\n    .filter(field => field.constraints?.required)\n    .map(field => field.name)\n\n  const extraFields = polarsFields.length - fields.length\n  const missingFields = fields.length - polarsFields.length\n\n  const extraNames = arrayDiff(polarsNames, names)\n  const missingNames = arrayDiff(names, polarsNames)\n  const missingRequiredNames = arrayDiff(requiredNames, polarsNames)\n\n  if (fieldsMatch === \"exact\") {\n    if (extraFields > 0) {\n      errors.push({\n        type: \"fields/extra\",\n        fieldNames: extraNames,\n      })\n    }\n\n    if (missingFields > 0) {\n      errors.push({\n        type: \"fields/missing\",\n        fieldNames: missingNames,\n      })\n    }\n  }\n\n  if (fieldsMatch === \"equal\") {\n    if (extraNames.length > 0) {\n      errors.push({\n        type: \"fields/extra\",\n        fieldNames: extraNames,\n      })\n    }\n\n    if (missingRequiredNames.length > 0) {\n      errors.push({\n        type: \"fields/missing\",\n        fieldNames: missingRequiredNames,\n      })\n    }\n  }\n\n  if (fieldsMatch === \"subset\") {\n    if (missingRequiredNames.length > 0) {\n      errors.push({\n        type: \"fields/missing\",\n        fieldNames: missingRequiredNames,\n      })\n    }\n  }\n\n  if (fieldsMatch === \"superset\") {\n    if (extraNames.length > 0) {\n      errors.push({\n        type: \"fields/extra\",\n        fieldNames: extraNames,\n      })\n    }\n  }\n\n  if (fieldsMatch === \"partial\") {\n    if (missingNames.length === fields.length) {\n      errors.push({\n        type: \"fields/missing\",\n        fieldNames: missingNames,\n      })\n    }\n  }\n\n  return errors\n}\n\nasync function validateFields(\n  table: Table,\n  schema: Schema,\n  polarsSchema: PolarsSchema,\n  invalidRowsLimit: number,\n) {\n  const errors: TableError[] = []\n  const targetNames: string[] = []\n\n  const sources = Object.entries(\n    normalizeFields(schema, polarsSchema, { dontParse: true }),\n  ).map(([name, expr]) => {\n    return expr.alias(`source:${name}`)\n  })\n\n  const targets = Object.entries(\n    normalizeFields(schema, polarsSchema, { dontParse: false }),\n  ).map(([name, expr]) => {\n    const targetName = `target:${name}`\n    targetNames.push(targetName)\n    return expr.alias(targetName)\n  })\n\n  let errorTable = table\n    .withRowCount()\n    .select(\n      col(\"row_nr\").add(1),\n      lit(false).alias(\"error\"),\n      ...sources,\n      ...targets,\n    )\n\n  for (const [index, field] of schema.fields.entries()) {\n    const polarsField = matchField(index, field, schema, polarsSchema)\n    if (polarsField) {\n      const fieldResult = validateField(field, { errorTable, polarsField })\n      errorTable = fieldResult.errorTable\n      errors.push(...fieldResult.errors)\n    }\n  }\n\n  const rowsResult = validateRows(schema, errorTable)\n  errorTable = rowsResult.errorTable\n  errors.push(...rowsResult.errors)\n\n  const errorFrame = await errorTable\n    .filter(col(\"error\").eq(true))\n    .head(invalidRowsLimit)\n    .drop(targetNames)\n    .collect()\n\n  for (const record of errorFrame.toRecords() as any[]) {\n    const typeErrorInFields: string[] = []\n    for (const [key, value] of Object.entries(record)) {\n      const [kind, type, name] = key.split(\":\")\n      if (kind === \"error\" && value === true && type && name) {\n        const rowNumber = record.row_nr\n\n        // Cell-level errors\n        if (type.startsWith(\"cell/\")) {\n          if (!typeErrorInFields.includes(name)) {\n            errors.push({\n              rowNumber,\n              type: type as any,\n              fieldName: name as any,\n              cell: (record[`source:${name}`] ?? \"\").toString(),\n            })\n          }\n\n          // Type error is a terminating error for a cell\n          if (type === \"cell/type\") {\n            typeErrorInFields.push(name)\n          }\n        }\n\n        // Row-level errors\n        if (type.startsWith(\"row/\")) {\n          errors.push({\n            rowNumber,\n            type: type as any,\n            fieldNames: name.split(\",\"),\n          })\n        }\n      }\n    }\n  }\n\n  return errors\n}\n\nfunction arrayDiff(a: string[], b: string[]) {\n  return a.filter(x => !b.includes(x))\n}\n"]}