Sdv

This release adds two new methods to the `MultiTableMetadata`: `detect_from_csvs` and `detect_From_dataframes`. These methods allow you to detect metadata for a whole dataset at once by either loading them from a folder or a dictionary mapping table names to the `pandas.DataFrames`. The `SingleTableMetadata` can now be visualized! Additionally, there is now a `summarized` option in the `show_table_details` parameter of the `visualize` methods. This will print each sdtype in the table and the number of columns that have that sdtype.

Additionally, this release patches a bug that prevented custom constraints from working on columns that were primary or alternate keys. It also adds support for Python 3.11!

New Features

* Align default transformers between SDV and RDT - Issue [1484](https://github.com/sdv-dev/SDV/issues/1484) by R-Palazzo
* Add visualize method to SingleTableMetadata - Issue [1517](https://github.com/sdv-dev/SDV/issues/1517) by pvk-developer
* Add detect_from_csvs and detect_from_dataframes methods to MultiTableMetadata - Issue [1520](https://github.com/sdv-dev/SDV/issues/1520) by R-Palazzo
* Allow empty tables to be fitted using fit_processed_data - Issue [1524](https://github.com/sdv-dev/SDV/issues/1524) by fealho
* Summarized metadata visualization - Issue [1525](https://github.com/sdv-dev/SDV/issues/1525) by pvk-developer

Bugs Fixed

* Cannot use custom constraint transforms for certain columns (inconsistent ordering in forward vs. reverse) - Issue [1476](https://github.com/sdv-dev/SDV/issues/1476) by fealho
* Cannot create custom constraint with primary key - Issue [1514](https://github.com/sdv-dev/SDV/issues/1514) by amontanez24

Maintenance

* Add support for Python 3.11 - Issue [1459](https://github.com/sdv-dev/SDV/issues/1459) by fealho

This release fixes a bug that caused the `Inequality` constraint and others to fail if there were None values in a datetime column.

Bugs Fixed

* Inequality fails with None and datetime - Issue [1471](https://github.com/sdv-dev/SDV/issues/1471) by pvk-developer

Maintenance

* Drop support for Python 3.7 - Issue [1487](https://github.com/sdv-dev/SDV/issues/1487) by pvk-developer

Internal

* Make HMA use hierarchical sampling mixin - Issue [1428](https://github.com/sdv-dev/SDV/issues/1428) by frances-h
* Move progress bar out of base multi table synthesizer - Issue [1486](https://github.com/sdv-dev/SDV/issues/1486) by R-Palazzo

This release adds a parameter called `verbose` to the `HMASynthesizer`. Setting it to True will show progress bars during the fitting steps. Additionally, performance optimizations were made to the modeling and initialization of the `HMASynthesizer`.

Multiple changes were made to enhance constraints. The `Range` constraint was improved to be able to generate more accurate data when null values are provided. Constraints are also now validated against the data when running `validate()` on any synthesizer.

Finally, some warnings were resolved.

New Features

* Report fitting progress for the HMASynthesizer - Issue [1440](https://github.com/sdv-dev/SDV/issues/1440) by pvk-developer

Bugs Fixed

* Range constraint does not produce cases of missing values & may create violative data - Issue [1393](https://github.com/sdv-dev/SDV/issues/1393) by R-Palazzo
* Synthesizers don't validate constraints during validate() - Issue [1402](https://github.com/sdv-dev/SDV/issues/1402) by pvk-developer
* Confusing error during metadata validation - Issue [1417](https://github.com/sdv-dev/SDV/issues/1417) by frances-h
* SettingWithCopyWarning when conditional sampling - [1436](https://github.com/sdv-dev/SDV/issues/1436) by pvk-developer
* HMASynthesizer is modeling child tables - Issue [1442](https://github.com/sdv-dev/SDV/issues/1442) by pvk-developer
* ValueError when sampling PII columns - Issue [1445](https://github.com/sdv-dev/SDV/issues/1445) by pvk-developer

Internal

* Add BaseHierarchicalSampler Mixin - Issue [1394](https://github.com/sdv-dev/SDV/issues/1394) by frances-h
* Add BaseIndependentSampler Mixin - Issue [1395](https://github.com/sdv-dev/SDV/issues/1395) by frances-h
* Synthesizers created twice during HMA init - Issue [1418](https://github.com/sdv-dev/SDV/issues/1418) by frances-h
* Get rid of unnecessary methods for single table sampling - Issue [1430](https://github.com/sdv-dev/SDV/issues/1430) by amontanez24
* Detect all addons from top level __init__ - PR [1453](https://github.com/sdv-dev/SDV/pull/1453) by frances-h

Maintenance

* Upgrade to torch 2.0 - Issue [1365](https://github.com/sdv-dev/SDV/issues/1365) by fealho
* During fit, there is a FutureWarning (due to RDT 1.5.0) - Issue [1456](https://github.com/sdv-dev/SDV/issues/1456) by amontanez24

This release adds a new initialization parameter to synthesizers called `locales` that allows users to set the locales to use for all columns that have a locale based `sdtype` (eg. `address` or `phone_number`). Additionally, it adds support for Pandas 2.0!

Multiple enhancements were made to improve the performance of data and metadata validation in synthesizers. The `Inequality` constraint was improved to be able to generate more scenarios of data concerning the presence of NaNs. Finally, many warnings have been resolved.

New Features

* Add add-on detection for new constraints - Issue [1397](https://github.com/sdv-dev/SDV/issues/1397) by frances-h
* Add add-on detection for multi and single table synthesizers - Issue [1385](https://github.com/sdv-dev/SDV/issues/1385) by frances-h
* Setting a locale for all my anonymized (PII) columns - Issue [1371](https://github.com/sdv-dev/SDV/issues/1371) by frances-h

Bugs Fixed

* Skip checking for Faker function if its a default sdtype - PR [1410](https://github.com/sdv-dev/SDV/pull/1410) by pvk-developer
* Inequality constraint does not produce all possibilities of missing values - Issue [1392](https://github.com/sdv-dev/SDV/issues/1392) by R-Palazzo
* Deprecated locale warning - Issue [1400](https://github.com/sdv-dev/SDV/issues/1400) by frances-h

Maintenance

* Use cached Faker instance to discover if an sdtype is a Faker function. - Issue [1405](https://github.com/sdv-dev/SDV/issues/1405) by pvk-developer
* Upgrade to pandas 2.0 - Issue [1366](https://github.com/sdv-dev/SDV/issues/1366) by pvk-developer

Internal

* Refactor Multi Table Modeling - Issue [1387](https://github.com/sdv-dev/SDV/issues/1387) by pvk-developer
* PytestConfigWarning: Unknown config option: collect_ignore - Issue [1376](https://github.com/sdv-dev/SDV/issues/1376) by amontanez24
* Pandas FutureWarning: Could not cast to int64 - Issue [1357](https://github.com/sdv-dev/SDV/issues/1357) by R-Palazzo
* RuntimeWarning: invalid value encountered in cast. - Issue [1369](https://github.com/sdv-dev/SDV/issues/1369) by amontanez24

This release improves the `load_custom_constraint_classes` method by removing the `table_name` parameter and just loading the constraint
for all tables instead. It also improves some error messages as well as removes some of the warnings that have been surfacing.

Support for sdtypes is enhanced by resolving a bug that was incorrecttly specifying Faker functions for some of them. Support for datetime formats has also been improved. Finally, the `path` argument in some `save` and `load` methods was changed to `filepath` for consistency.

New Features

* Method load_custom_constraint_classes does not need table_name parameter - Issue [1354](https://github.com/sdv-dev/SDV/issues/1354) by R-Palazzo
* Improve error message for invalid primary keys - Issue [1341](https://github.com/sdv-dev/SDV/issues/1341) by R-Palazzo
* Add functionality to find version add-on - Issue [1309](https://github.com/sdv-dev/SDV/issues/1309) by frances-h

Bugs Fixed

* Certain sdtypes cause Faker to raise error - Issue [1346](https://github.com/sdv-dev/SDV/issues/1346) by frances-h
* Change path to filepath for load and save methods - Issue [1352](https://github.com/sdv-dev/SDV/issues/1352) by fealho
* Some datetime formats cause InvalidDataError, even if the datetime matches the format - Issue [1136](https://github.com/sdv-dev/SDV/issues/1136) by amontanez24

Internal

* Inequality constraint raises RuntimeWarning (invalid value encountered in log) - Issue [1275](https://github.com/sdv-dev/SDV/issues/1275) by frances-h
* Pandas FutureWarning: Default dtype for Empty Series will be 'object' - Issue [1355](https://github.com/sdv-dev/SDV/issues/1355) by R-Palazzo
* Pandas FutureWarning: Length 1 tuple will be returned - Issue [1356](https://github.com/sdv-dev/SDV/issues/1356) by R-Palazzo

This is a major release that introduces a new API to the `SDV` aimed at streamlining the process of synthetic data generation! To achieve this, this release includes the addition of several large features.

Metadata

Some of the most notable additions are the new `SingleTableMetadata` and `MultiTableMetadata` classes. These classes enable a number of features that make it easier to synthesize your data correctly such as:

* Automatic data detection - Calling `metadata.detect_from_dataframe()` or `metadata.detect_from_csv()` will populate the metadata autonomously with values it thinks represent the data.
* Easy updating - Once an instance of the metadata is created, values can be easily updated using a number of methods defined in the API. For more info, view the [docs](https://docs.sdv.dev/sdv/single-table-data/data-preparation/single-table-metadata-api).
* Metadata validation - Calling `metadata.validate()` will return a report of any invalid definitions in the metadata specification.
* Upgrading - Users with the previous metadata format can easily update to the new specification using the `upgrade_metadata()` method.
* Saving and loading - The metadata itself can easily be saved to a json file and loaded back up later.

Class and Module Names

Another major change is the renaming of our core modeling classes and modules. The name changes are meant to highlight the difference between the underlying machine learning models, and the objects responsible for the end-to-end workflow of generating synthetic data. The main name changes are as follows:
* `tabular` -> `single_table`
* `relational` -> `multi_table`
* `timeseries` -> `sequential`
* `BaseTabularModel` -> `BaseSingleTableSynthesizer`
* `GaussianCopula` -> `GaussianCopulaSynthesizer`
* `CTGAN` -> `CTGANSynthesizer`
* `TVAE` -> `TVAESynthesizer`
* `CopulaGan` -> `CopulaGANSynthesizer`
* `PAR` -> `PARSynthesizer`
* `HMA1` -> `HMASynthesizer`

In `SDV` 1.0, synthesizers are classes that take in metadata and handle data preprocessing, model training and model sampling. This is similar to the previous `BaseTabularModel` in `SDV` <1.0.

Synthetic Data Workflow

`Synthesizers` in `SDV` 1.0 define a clear workflow for generating synthetic data.
1. Synthesizers are initialized with a metadata class.
2. They can then be used to transform the data and apply constraints using the `synthesizer.preprocess()` method. This step also validates that the data matches the provided metadata to avoid errors in fitting or sampling.
3. The processed data can then be fed into the underlying machine learning model using `synthesizer.fit_processed_data()`. (Alternatively, data can be preprocessed and fit to the model using `synthesizer.fit()`.)
4. Data can then be sampled using `synthesizer.sample()`.

Each synthesizer class also provides a series of methods to help users customize the transformations their data goes through. Read more about that [here](https://docs.sdv.dev/sdv/single-table-data/modeling/synthetic-data-workflow/transform-and-anonymize).

Notice that the preprocessing and model fitting steps can now be separated. This can be helpful if preprocessing is time consuming or if the data has been processed externally.

Other Highly Requested Features

Another major addition is control over randomization. In `SDV` <1.0, users could set a seed to control the randomization for only some columns. In `SDV` 1.0, randomization is controlled for all columns. Every new call to sample generates new data, but the synthesizer's seed can be reset to the original state using `synthesizer.reset_randomization()`, enabling reproducibility.

`SDV 1.0` adds accessibility and transparency into the transformers used for preprocessing and underlying machine learning models.
* Using the `synthesizer.get_transformers()` method, you can access the transformers used to preprocess each column and view their properties. This can be useful for debugging and accessing privacy information like mappings used to mask data.
* Distribution parameters learned by copula models can be accessed using the `synthesizer.get_learned_distributions()` method.

PII handling is improved by the following features:
* Primary keys can be set to natural sdtypes (eg. SSN, email, name). Previously they could only be numerical or text.
* The `PseudoAnonymizedFaker` can be used to provide consistent mapping to PII columns. As mentioned before, the mapping itself can be accessed by viewing the transformers for the column using `synthesizer.get_transformers()`.
* A bug causing PII columns to slow down modeling is patched.

Finally, the synthetic data can now be easily evaluated using the `evaluate_quality()` and `run_diagnostic()` methods. The data can be compared visually to the actual data using the `get_column_plot()` and `get_column_pair_plot()` methods. For more info on how to visualize or interpret the synthetic data evaluation, read the docs [here](https://docs.sdv.dev/sdv/single-table-data/evaluation).

Issues Resolved

New Features

* Change auto_assign_transformers to handle id types - Issue [1325](https://github.com/sdv-dev/SDV/issues/1325) by pvk-developer
* Change 'text' sdtype to 'id' - Issue [1324](https://github.com/sdv-dev/SDV/issues/1324) by frances-h
* In `upgrade_metadata`, return the object instead of writing it to a JSON file - Issue [1319](https://github.com/sdv-dev/SDV/issues/1319) by frances-h
* In `upgrade_metadata` index primary keys should be converted to `text` - Issue [1318](https://github.com/sdv-dev/SDV/issues/1318) by amontanez24
* Add `load_from_dict` to SingleTableMetadata and MultiTableMetadata - Issue [1314](https://github.com/sdv-dev/SDV/issues/1314) by amontanez24
* Throw a `SynthesizerInputError` if `FixedCombinations` constraint is applied to a column that is not `boolean` or `categorical` - Issue [1306](https://github.com/sdv-dev/SDV/issues/1306) by frances-h
* Missing `save` and `load` methods for `HMASynthesizer` - Issue [1262](https://github.com/sdv-dev/SDV/issues/1262) by amontanez24
* Better input validation when creating single and multi table synthesizers - Issue [1242](https://github.com/sdv-dev/SDV/issues/1242) by fealho
* Better input validation on `HMASynthesizer.sample` - Issue [1241](https://github.com/sdv-dev/SDV/issues/1241) by R-Palazzo
* Validate that relationship must be between a `primary key` and `foreign key` - Issue [1236](https://github.com/sdv-dev/SDV/issues/1236) by fealho
* Improve `update_column` validation for `pii` attribute - Issue [1226](https://github.com/sdv-dev/SDV/issues/1226) by pvk-developer
* Order the output of `get_transformers()` based on the metadata - Issue [1222](https://github.com/sdv-dev/SDV/issues/1222) by pvk-developer
* Log if any `numerical_distributions` will not be applied - Issue [1212](https://github.com/sdv-dev/SDV/issues/1212) by fealho
* Improve error handling for `GaussianCopulaSynthesizer`: `numerical_distributions` - Issue [1211](https://github.com/sdv-dev/SDV/issues/1211) by fealho
* Improve error handling when validating `constraints` - Issue [1210](https://github.com/sdv-dev/SDV/issues/1210) by fealho
* Add `fake_companies` demo - Issue [1209](https://github.com/sdv-dev/SDV/issues/1209) by amontanez24
* Allow me to create a custom constraint class and use it in the same file - Issue [1205](https://github.com/sdv-dev/SDV/issues/1205) by amontanez24
* Sampling should reset after retraining the model - Issue [1201](https://github.com/sdv-dev/SDV/issues/1201) by pvk-developer
* Change function name `HMASynthesizer.update_table_parameters` --> `set_table_parameters` - Issue [1200](https://github.com/sdv-dev/SDV/issues/1200) by pvk-developer
* Add `get_info` method to synthesizers - Issue [1199](https://github.com/sdv-dev/SDV/issues/1199) by fealho
* Add evaluation methods to synthesizer - Issue [1190](https://github.com/sdv-dev/SDV/issues/1190) by fealho
* Update `evaluate.py` to work with the new `metadata` - Issue [1186](https://github.com/sdv-dev/SDV/issues/1186) by fealho
* Remove old code - Issue [1181](https://github.com/sdv-dev/SDV/issues/1181) by pvk-developer
* Drop support for python 3.6 and add support for 3.10 - Issue [1176](https://github.com/sdv-dev/SDV/issues/1176) by fealho
* Add constraint methods to MultiTableSynthesizers - Issue [1171](https://github.com/sdv-dev/SDV/issues/1171) by fealho
* Update custom constraint workflow - Issue [1169](https://github.com/sdv-dev/SDV/issues/1169) by pvk-developer
* Add get_constraints method to synthesizers - Issue [1168](https://github.com/sdv-dev/SDV/issues/1168) by pvk-developer
* Migrate adding and validating constraints to BaseSynthesizer - Issue [1163](https://github.com/sdv-dev/SDV/issues/1163) by pvk-developer
* Change metadata `"SCHEMA_VERSION"` --> `"METADATA_SPEC_VERSION"` - Issue [1139](https://github.com/sdv-dev/SDV/issues/1139) by amontanez24
* Add ability to reset random sampling - Issue [1130](https://github.com/sdv-dev/SDV/issues/1130) by pvk-developer
* Add get_available_demos - Issue [1129](https://github.com/sdv-dev/SDV/issues/1129) by fealho
* Add demo loading functionality - Issue [1128](https://github.com/sdv-dev/SDV/issues/1128) by fealho
* Use logging instead of printing in detect methods - Issue [1107](https://github.com/sdv-dev/SDV/issues/1107) by fealho
* Add save and load methods to synthesizers - Issue [1106](https://github.com/sdv-dev/SDV/issues/1106) by pvk-developer
* Add sampling methods to PARSynthesizer - Issue [1083](https://github.com/sdv-dev/SDV/issues/1083) by amontanez24
* Add transformer methods to PARSynthesizer - Issue [1082](https://github.com/sdv-dev/SDV/issues/1082) by fealho
* Add validate to PARSynthesizer - Issue [1081](https://github.com/sdv-dev/SDV/issues/1081) by amontanez24
* Add preprocess and fit methods to PARSynthesizer - Issue [1080](https://github.com/sdv-dev/SDV/issues/1080) by amontanez24
* Create SingleTablePreset - Issue [1079](https://github.com/sdv-dev/SDV/issues/1079) by amontanez24
* Add sample method to multi-table synthesizers - Issue [1078](https://github.com/sdv-dev/SDV/issues/1078) by pvk-developer
* Add get_learned_distributions method to synthesizers - Issue [1075](https://github.com/sdv-dev/SDV/issues/1075) by pvk-developer
* Add preprocess and fit methods to multi-table synthesizers - Issue [1074](https://github.com/sdv-dev/SDV/issues/1074) by pvk-developer
* Add transformer related methods to BaseMultiTableSynthesizer - Issue [1072](https://github.com/sdv-dev/SDV/issues/1072) by fealho
* Add validate method to `BaseMultiTableSynthesizer` - Issue [1071](https://github.com/sdv-dev/SDV/issues/1071) by pvk-developer
* Create BaseMultiTableSynthesizer and HMASynthesizer classes - Issue [1070](https://github.com/sdv-dev/SDV/issues/1070) by pvk-developer
* Create PARSynthesizer - Issue [1055](https://github.com/sdv-dev/SDV/issues/1055) by amontanez24
* Raise an error if an invalid sdtype is provided to the metadata - Issue [1042](https://github.com/sdv-dev/SDV/issues/1042) by amontanez24
* Only allow datetime and numerical sdtypes to be set as the sequence index - Issue [1030](https://github.com/sdv-dev/SDV/issues/1030) by amontanez24
* Change set_alternate_keys to add_alternate_keys and add error handling - Issue [1029](https://github.com/sdv-dev/SDV/issues/1029) by amontanez24
* Create `MultiTableMetadata.add_table` method - Issue [1024](https://github.com/sdv-dev/SDV/issues/1024) by amontanez24
* Add update_transformers to synthesizers - Issue [1021](https://github.com/sdv-dev/SDV/issues/1021) by fealho
* Add assign_transformers and get_transformers methods to synthesizers - Issue [1020](https://github.com/sdv-dev/SDV/issues/1020) by pvk-developer
* Add fit and fit_processed_data methods to synthesizers - Issue [1019](https://github.com/sdv-dev/SDV/issues/1019) by pvk-developer
* Add preprocess method to synthesizers - Issue [1018](https://github.com/sdv-dev/SDV/issues/1018) by pvk-developer
* Add sampling to synthesizer classes - Issue [1015](https://github.com/sdv-dev/SDV/issues/1015) by pvk-developer
* Add validate method to synthesizer - Issue [1014](https://github.com/sdv-dev/SDV/issues/1014) by fealho
* Create GaussianCopula, CTGAN, TVAE and CopulaGAN synthesizer classes - Issue [1013](https://github.com/sdv-dev/SDV/issues/1013) by pvk-developer
* Create BaseSynthesizer class - Issue [1012](https://github.com/sdv-dev/SDV/issues/1012) by pvk-developer
* Add constraint conversion to upgrade_metadata - Issue [1005](https://github.com/sdv-dev/SDV/issues/1005) by amontanez24
* Add method to generate keys to DataProcessor - Issue [994](https://github.com/sdv-dev/SDV/issues/994) by pvk-developer
* Create formatter - Issue [970](https://github.com/sdv-dev/SDV/issues/970) by fealho
* Create a utility to load multiple CSV files at once - Issue [969](https://github.com/sdv-dev/SDV/issues/969) by amontanez24
* Create a utility to convert old --> new metadata format - Issue [966](https://github.com/sdv-dev/SDV/issues/966) by amontanez24
* Add validation check that `primary_key`, `alternate_keys` and `sequence_key` cannot be sdtype categorical - Issue [963](https://github.com/sdv-dev/SDV/issues/963) by fealho
* Add anonymization to DataProcessor - Issue [950](https://github.com/sdv-dev/SDV/issues/950) by pvk-developer
* Add utility methods to DataProcessor - Issue [948](https://github.com/sdv-dev/SDV/issues/948) by fealho
* Add fit, transform and reverse_transform to DataProcessor - Issue [947](https://github.com/sdv-dev/SDV/issues/947) by amontanez24
* Create DataProcessor class - Issue [946](https://github.com/sdv-dev/SDV/issues/946) by amontanez24
* Add add_constraint method to MultiTableMetadata - Issue [895](https://github.com/sdv-dev/SDV/issues/895) by amontanez24
* Add key related methods to MultiTableMetadata - Issue [894](https://github.com/sdv-dev/SDV/issues/894) by fealho
* Add update_column and add_column methods to MultiTableMetadata - Issue [893](https://github.com/sdv-dev/SDV/issues/893) by amontanez24
* Add detect methods to MultiTableMetadata - Issue [892](https://github.com/sdv-dev/SDV/issues/892) by amontanez24
* Add load_from_json and save_to_json methods to the MultiTableMetadata - Issue [891](https://github.com/sdv-dev/SDV/issues/891) by fealho
* Add add_relationship method to MultiTableMetadata - Issue [890](https://github.com/sdv-dev/SDV/issues/890) by pvk-developer
* Add validate method to MultiTableMetadata - Issue [888](https://github.com/sdv-dev/SDV/issues/888) by pvk-developer
* Add visualize method to MultiTableMetadata class - Issue [884](https://github.com/sdv-dev/SDV/issues/884) by amontanez24
* Create MultiTableMetadata class - Issue [883](https://github.com/sdv-dev/SDV/issues/883) by pvk-developer
* Add add_constraint method to SingleTableMetadata - Issue [881](https://github.com/sdv-dev/SDV/issues/881) by amontanez24
* Add key related methods to SingleTableMetadata - Issue [880](https://github.com/sdv-dev/SDV/issues/880) by fealho
* Add validate method to SingleTableMetadata - Issue [879](https://github.com/sdv-dev/SDV/issues/879) by fealho
* Add _validate_inputs class method to each constraint - Issue [878](https://github.com/sdv-dev/SDV/issues/878) by fealho
* Add update_column and add_column methods to SingleTableMetadata - Issue [877](https://github.com/sdv-dev/SDV/issues/877) by pvk-developer
* Add detect methods to SingleTableMetadata - Issue [876](https://github.com/sdv-dev/SDV/issues/876) by pvk-developer
* Add load_from_json and save_to_json methods to SingleTableMetadata - Issue [874](https://github.com/sdv-dev/SDV/issues/874) by pvk-developer
* Create SingleTableMetadata class - Issue [873](https://github.com/sdv-dev/SDV/issues/873) by pvk-developer

Bugs Fixed

* In `upgrade_metadata`, PII values are being converted to generic categorical columns - Issue [1317](https://github.com/sdv-dev/SDV/issues/1317) by frances-h
* `PARSynthesizer` is missing `save` and `load` methods - Issue [1289](https://github.com/sdv-dev/SDV/issues/1289) by amontanez24
* Confusing warning when updating transformers - Issue [1272](https://github.com/sdv-dev/SDV/issues/1272) by frances-h
* When adding constraints, `auto_assign_transformers` is showing columns that should no longer exist - Issue [1260](https://github.com/sdv-dev/SDV/issues/1260) by pvk-developer
* Cannot fit twice if I modify transformers: `ValueError: There are non-numerical values in your data.` - Issue [1259](https://github.com/sdv-dev/SDV/issues/1259) by frances-h
* Cannot fit twice if I add constraints: `ValueError: There are non-numerical values in your data.` - Issue [1258](https://github.com/sdv-dev/SDV/issues/1258) by frances-h
* `HMASynthesizer` errors out when fitting a dataset that has a table which holds primary key and foreign keys only - Issue [1257](https://github.com/sdv-dev/SDV/issues/1257) by pvk-developer
* Change ValueErrors to InvalidMetadataErrors - Issue [1251](https://github.com/sdv-dev/SDV/issues/1251) by frances-h
* Multi-table should show foreign key transformers as None - Issue [1249](https://github.com/sdv-dev/SDV/issues/1249) by frances-h
* Cannot use `HMASynthesizer.fit_processed_data` more than once (`KeyError`) - Issue [1240](https://github.com/sdv-dev/SDV/issues/1240) by frances-h
* Function `get_available_demos` crashes if a dataset's `num-tables` or `size-MB` cannot be found - Issue [1215](https://github.com/sdv-dev/SDV/issues/1215) by amontanez24
* Cannot supply a natural key to `HMASynthesizer` (where `sdtype` is custom): Error in `sample` - Issue [1214](https://github.com/sdv-dev/SDV/issues/1214) by pvk-developer
* Unable to sample when using a `PseudoAnonymizedFaker` - Issue [1207](https://github.com/sdv-dev/SDV/issues/1207) by pvk-developer
* Incorrect `sdtype` specified in demo dataset `student_placements_pii` - Issue [1206](https://github.com/sdv-dev/SDV/issues/1206) by amontanez24
* Auto assigned transformers for datetime columns don't have the right parameters - Issue [1204](https://github.com/sdv-dev/SDV/issues/1204) by pvk-developer
* Cannot apply `Inequality` constraint on demo dataset's datetime columns - Issue [1203](https://github.com/sdv-dev/SDV/issues/1203) by pvk-developer
* pii should not be required to auto-assign faker transformers - Issue [1194](https://github.com/sdv-dev/SDV/issues/1194) by pvk-developer
* Misc. bug fixes for SDV 1.0.0 - Issue [1193](https://github.com/sdv-dev/SDV/issues/1193) by pvk-developer
* Small bug fixes in demo module - Issue [1192](https://github.com/sdv-dev/SDV/issues/1192) by pvk-developer
* Foreign Keys are added as Alternate Keys when upgrading - Issue [1143](https://github.com/sdv-dev/SDV/issues/1143) by pvk-developer
* Alternate keys not unique when assigned to a semantic type - Issue [1111](https://github.com/sdv-dev/SDV/issues/1111) by pvk-developer
* Synthesizer errors if column is semantic type and pii is False - Issue [1110](https://github.com/sdv-dev/SDV/issues/1110) by fealho
* Sampled values not unique if primary key is numerical - Issue [1109](https://github.com/sdv-dev/SDV/issues/1109) by pvk-developer
* Validate not called during synthesizer creation - Issue [1105](https://github.com/sdv-dev/SDV/issues/1105) by pvk-developer
* SingleTableSynthesizer fit doesn't update rounding - Issue [1104](https://github.com/sdv-dev/SDV/issues/1104) by amontanez24
* Method `auto_assign_tranformers` always sets `enforce_min_max_values=True` - Issue [1095](https://github.com/sdv-dev/SDV/issues/1095) by fealho
* Sampled context columns in PAR must be in the same order - Issue [1052](https://github.com/sdv-dev/SDV/issues/1052) by amontanez24
* Incorrect schema version printing during detect_table_from_dataframe - Issue [1038](https://github.com/sdv-dev/SDV/issues/1038) by amontanez24
* Same relationship can be added twice to MultiTableMetadata - Issue [1031](https://github.com/sdv-dev/SDV/issues/1031) by amontanez24
* Miscellaneous metadata bugs - Issue [1026](https://github.com/sdv-dev/SDV/issues/1026) by amontanez24

Maintenance

* SDV Package Maintenance Updates - Issue [1140](https://github.com/sdv-dev/SDV/issues/1140) by amontanez24

Internal

* Add integration tests for 'Synthesize Sequences' demo - Issue [1295](https://github.com/sdv-dev/SDV/issues/1295) by pvk-developer
* Add integration tests for 'Adding Constraints' demo - Issue [1280](https://github.com/sdv-dev/SDV/issues/1280) by pvk-developer
* Add integration tests to the 'Use Your Own Data' demo - Issue [1278](https://github.com/sdv-dev/SDV/issues/1278) by frances-h
* Add integration tests for 'Synthesize Multi Tables' demo - Issue [1277](https://github.com/sdv-dev/SDV/issues/1277) by pvk-developer
* Add integration tests for 'Synthesize a Table' demo - Issue [1276](https://github.com/sdv-dev/SDV/issues/1276) by frances-h
* Update `get_available_demos` tests - Issue [1247](https://github.com/sdv-dev/SDV/issues/1247) by fealho
* Make private attributes public in the metadata - Issue [1245](https://github.com/sdv-dev/SDV/issues/1245) by fealho