typescript-mysql-model/lib/schema-operator.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
class SchemaOperator {
    /**
     * Return a copy of the object without any primary keys
     */
    removePrimaryKeys(tableName, data) {
        const filtered = JSON.parse(JSON.stringify(data)); // copy
        this.getPrimaryKeyNames(tableName).forEach(pk => delete filtered[pk]);
        return filtered;
    }
    retainPrimaryKeys(tableName, data) {
        const keyData = {};
        this.getPrimaryKeyNames(tableName).forEach(key => keyData[key] = data[key]);
        return keyData;
    }
    getPkCols(tableName) {
        if (!tableName) {
            return [];
        }
        const cols = [];
        const table = this.definition.tables[tableName];
        for (const key in table) {
            if (table[key].isPrimary) {
                cols.push(table[key]);
            }
        }
        return cols;
    }
    /**
     * return a new object where with only attributes that have
     * a corresponding column for given table
     * @param table
     * @param data
     */
    stripNoneBelonging(tableName, data) {
        const table = this.definition.tables[tableName];
        const copy = {};
        Object.keys(data).filter(key => !!table[key]).forEach(key => {
            copy[key] = data[key];
        });
        return copy;
    }
    /**
     * List the names of all primary keys in a table
     * @param tableName
     */
    getPrimaryKeyNames(tableName) {
        const cols = this.getPkCols(tableName);
        if (!cols || cols.length === 0) {
            return [];
        }
        return cols.map(col => col.field);
    }
}
exports.SchemaOperator = SchemaOperator;
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